টুলস
Utilities to help you diagnose connectivity issues and check service availability.
ডোমেইন চেক করুন
Instantly verify whether a website or domain is reachable. Get the HTTP status, detect WAF blocks, and submit untracked domains for review.
DNS লুকআপ
Retrieve comprehensive DNS records for any domain, including A, MX, NS, and TXT. Essential for troubleshooting domain configuration.
MX লুকআপ
Specifically find and verify Mail Exchange (MX) records. Determine which mail servers are handling email for a domain.
SSL লুকআপ
Check the SSL certificate details for any domain. Verify validity, issuer information, and expiration dates for secure connections.
পোর্ট চেকার
Test whether a specific TCP port is open or closed on any host or IP address. Useful for diagnosing firewall rules and service availability.
সাবনেট ক্যালকুলেটর
Calculate network address, broadcast, host range, subnet mask, and wildcard mask from any IPv4 CIDR block.
স্পিড টেস্ট
Measure your internet connection's ping, download speed, and upload speed directly from your browser — no plugins required.
What's My IP?
Instantly see your public IP address as detected by our servers. Useful for verifying VPN or proxy connections.
আমার ISP কী?
Quickly find out which Internet Service Provider (ISP) you are currently using based on your connection.
IP লুকআপ
Find out what part of the country or world an Internet user is in by looking up their IP address.
Image Size Reducer
Compress and resize images directly in your browser. Reduce file size for faster web performance without losing visibility.
ইনস্টাগ্রাম ডাউনলোডার
Download photos, videos, and reels from any public Instagram post. Paste the link and save the media in one click.
PDF to JPG
Convert each page of your PDF document into high-quality JPG image files instantly in your browser.
PDF থেকে Word
Easily convert PDF files to editable Microsoft Word (DOCX) documents while preserving formatting.
PDF to PowerPoint
Turn PDF documents into editable PowerPoint (PPTX) presentations to make slideshows from static pages.
PDF থেকে Excel
Extract tables and spreadsheet data from PDF files to Microsoft Excel (XLSX) format.
PDF to PDF/A
Convert standard PDF documents into PDF/A format designed for long-term archiving and preservation.
JPG থেকে PDF
Merge one or multiple JPG image files into a single, cohesive PDF document.
Merge PDF
Combine multiple PDF documents into a single file. Drag to reorder pages before merging.
PDF স্প্লিট
Split a PDF into multiple files by custom page ranges, individual pages, or equal chunks. All processing happens in your browser.
Compress PDF
Reduce the file size of your PDF documents while maintaining quality. Choose from low, medium, or high compression levels.
Sign PDF
Add your signature to PDF documents digitally. Type, draw, or upload your signature and place it anywhere on the document.
Word থেকে PDF
Secure layout and text formatting by converting Microsoft Word documents to PDF files.
Powerpoint to PDF
Turn PowerPoint presentations into easy-to-print, universal PDF files without losing slide layouts.
Excel থেকে PDF
Convert Excel spreadsheets into readable and paginated PDF documents for sharing.
PNG to PDF
Convert PNG images to PDF instantly in your browser. No upload needed.
WebP to PDF
Convert WebP images to PDF format quickly and securely in your browser.
DOC to PDF
Convert legacy Word documents (.doc) to PDF format using our server-side converter.
XLS to PDF
Convert legacy Excel spreadsheets (.xls) to PDF format using our server-side converter.
Unlock PDF
Remove password protection from PDF files. You must know the current password to unlock the document.
Watermark PDF
Add text or image watermarks to every page of your PDF document for branding or protection.
TXT to PDF
Convert plain text files to PDF with customizable fonts, page size, and line spacing.
RTF to PDF
Convert Rich Text Format documents to PDF while preserving formatting and styles.
ODT to PDF
Convert OpenDocument Text files to PDF format while maintaining document structure.
JSON বিউটিফায়ার
Format and validate raw JSON into a readable structure, or minify it for production use.
XML to JSON
Convert XML documents to JSON format instantly. Preserves structure and attributes.
CSV to JSON
Transform CSV spreadsheet data into JSON arrays or objects. Configurable delimiter support.
YAML to JSON
Convert YAML configuration files to JSON format. Handles nested structures and arrays.
JSON to Excel
Convert JSON data arrays to Excel spreadsheets. Flatten nested objects automatically.
JSON to SQL
Generate SQL INSERT statements from JSON data. Supports MySQL, PostgreSQL, and SQLite.
JWT Decoder
Decode and inspect JSON Web Tokens. View header, payload, and verify signature.
JSON Schema Validator
Validate JSON data against JSON Schema definitions. Get detailed error reporting.
JSON Path Query
Extract data from JSON using JSONPath expressions. Like XPath but for JSON.
JSON Query (JQ)
Run JQ queries on JSON data. Powerful filtering, mapping, and transformation.
JSON Diff
Compare two JSON documents side by side. Visual highlighting of differences.
JSON Flatten
Flatten nested JSON objects to dot-notation keys. Useful for CSV conversion.
JSON Tree Viewer
Visualize JSON as an interactive tree structure. Collapsible nodes and syntax highlighting.
JSON Sorter
Sort JSON keys alphabetically or by value. Recursively sort nested objects.
JSON Generator
Generate sample JSON data with customizable schemas. Useful for testing and mocking.
JSON Linter
Check JSON syntax and catch errors. Get line numbers and helpful error messages.
JSON Base64
Encode and decode JSON to Base64 format. Useful for data URIs and transmission.
Base64 Image Converter
Encode any image to a Base64 data URI, or decode a Base64 string back to a viewable and downloadable image.
Remove PDF Metadata
Strip all metadata from PDF documents including author, title, subject, keywords, and creation dates.
Edit PDF Document Info
Edit the metadata of PDF documents including title, author, subject, keywords, and more.
Bookmark PDF
Add navigational bookmarks and outlines to PDF documents. Create a table of contents for easy navigation.
Flatten PDF
Merge annotations, form fields, and interactive content into the base PDF layer. Makes documents non-editable.
Annotate PDF
Add comments, highlights, sticky notes, and markup to PDF documents with various annotation tools.
Pages Per Sheet (N-Up)
Print multiple PDF pages on a single sheet. Perfect for saving paper and creating handouts (2, 4, 6, 9 pages per sheet).
Change PDF Page Size
Resize PDF pages to standard paper sizes (A4, Letter, Legal, A3, A5) or custom dimensions.
Halve PDF Pages
Split each PDF page into two pages horizontally or vertically. Perfect for creating booklets or splitting wide documents.
Crop PDF
Trim margins and crop pages to remove unwanted areas from your PDF documents with precise margin controls.
Repair PDF
Fix corrupted or damaged PDF files. Attempts to recover content from problematic PDFs with error recovery options.
Camera to PDF
Use your camera to capture photos and convert them into a PDF document. Perfect for scanning documents on the go.
Job Application PDF
Generate a professional job application PDF with your information. Fill in details to create a complete application document.
View as PDF
Convert web pages or HTML content to PDF. Enter a URL or paste HTML to generate a printable PDF version.
PDF Viewer Preferences
Configure how your PDF opens in viewers. Set initial zoom, page layout, fullscreen mode, and window options.
Create Invoice
Generate a professional PDF invoice with your business details, line items, tax calculations, and totals.
Invoice Designer
Design your invoice visually with customizable colors, templates, and branded layouts.
E-Invoice
Generate structured electronic invoices with XML-embedded data for automated processing. UBL and Factur-X compatible.
URL Shortener
Create short, shareable links from long URLs. Perfect for social media, emails, and text messages where character count matters.
Regex Tester
Test and debug regular expressions with real-time match highlighting, capture groups visualization, and pattern explanation.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, SHA-512 hashes for text and files. Useful for verification and security checks.
Color Converter
Convert between HEX, RGB, HSL, and CMYK color formats. Includes color picker, contrast checker, and palette generator.
CSV ↔ Excel
Convert between CSV and Excel formats. Upload files or paste data directly. Supports large files with preview.
Lorem Ipsum Generator
Generate placeholder text for designs and mockups. Multiple styles including classic, business, tech, and medical.
Code Formatter
Format and beautify HTML, CSS, JavaScript, JSON, SQL, and XML. Fix indentation and validate syntax.
Unit Converter
Convert length, weight, temperature, area, volume, speed, and digital storage units. Quick and accurate.
Pipeline Builder
Chain multiple tools together for automated workflows. Convert, optimize, and transform files in one seamless process.
Password Generator
Create strong, secure passwords with customizable options. Generate random passwords with various character types and complexity.
QR Code Generator
Create QR codes for URLs, text, emails, phone numbers, WiFi, and vCard contacts. Customize colors and download as PNG or SVG.
Fill PDF Form
Automatically fill PDF form fields with your data. Upload a fillable PDF and enter values for each field.
Create Fillable Form
Design and create PDF forms with fillable fields. Add text fields, checkboxes, dropdowns, and radio buttons.
HEIC to JPG
Convert Apple HEIC/HEIF images to JPG format. Instantly compatible with all browsers, apps, and devices.
HEIC to PNG
Convert Apple HEIC/HEIF images to PNG format. Preserve transparency and quality for editing or sharing.
WEBP to JPG
Convert WebP images to JPG format for broader compatibility with apps, email clients, and legacy software.
WEBP to PNG
Convert WebP images to PNG format. Lossless output with full transparency support for design workflows.
BMI Calculator
Calculate your Body Mass Index using metric or imperial units. Includes BMI category, healthy weight range, and health guidance.
Mortgage Calculator
Calculate monthly mortgage payments, amortization schedule, and total interest.
Loan Calculator
Calculate monthly payment, total interest, and amortization for any loan.
Auto Loan Calculator
Calculate car loan payments with trade-in, tax, and down payment.
Interest Calculator
Compare compound and simple interest on any investment or loan.
Payment Calculator
Solve for monthly payment, loan amount, term, or interest rate.
Retirement Calculator
Project retirement savings with contributions, returns, and inflation.
Amortization Calculator
Full amortization schedule with extra payment scenarios.
Investment Calculator
Project investment growth with contributions and compounding.
Inflation Calculator
Calculate purchasing power erosion and future value adjusted for inflation.
Finance Calculator
Solve for any Time Value of Money variable: PV, FV, PMT, rate, or periods.
Income Tax Calculator
Estimate federal income tax with bracket breakdown and effective rate.
Compound Interest Calculator
Calculate compound interest growth with regular additions.
Salary Calculator
Convert hourly wage or annual salary to all pay period equivalents.
Interest Rate Calculator
Find the interest rate from loan amount, payment, and term.
Sales Tax Calculator
Add or remove sales tax from any price.
House Affordability Calculator
Estimate how much home you can afford based on income and debts.
Savings Calculator
Project savings growth over time with regular deposits.
401(k) Calculator
Project 401(k) balance with employer match, raises, and market returns.
Mortgage Payoff Calculator
See how extra payments reduce your mortgage payoff time and interest.
Currency Calculator
Convert between currencies with live exchange rates.
Credit Card Calculator
Calculate payoff time or required payment for a credit card balance.
Credit Card Payoff Calculator
Payoff multiple cards with avalanche or snowball strategy.
Debt Payoff Calculator
See how long to pay off debt and compare payment scenarios.
Debt Consolidation Calculator
Compare consolidating multiple debts into a single lower-rate loan.
Student Loan Calculator
Calculate student loan payments and compare repayment plans.
Budget Calculator
Track income vs. expenses and check the 50/30/20 rule.
Rental Property Calculator
Analyze rental property ROI, cap rate, and cash flow.
ROI Calculator
Calculate return on investment, annualized return, and net profit.
IRR Calculator
Calculate the internal rate of return for any series of cash flows.
APR Calculator
Calculate true APR including fees and compare loan costs.
Simple Interest Calculator
Calculate interest using the simple interest formula I = Prt.
CD Calculator
Project certificate of deposit maturity value, interest, and APY.
Bond Calculator
Calculate bond price, YTM, current yield, and coupon payments.
Roth IRA Calculator
Project Roth IRA balance with tax-free growth and contributions.
IRA Calculator
Compare Traditional vs. Roth IRA after-tax retirement value.
RMD Calculator
Calculate required minimum distributions from your IRA or 401(k).
VAT Calculator
Add or remove Value Added Tax from any amount.
Repayment Calculator
Full loan repayment schedule with extra payment options.
College Cost Calculator
Project future tuition costs and monthly savings needed.
Mutual Fund Calculator
Project mutual fund returns with expense ratio and loads.
Auto Lease Calculator
Calculate car lease payments with money factor and residual value.
Depreciation Calculator
Calculate asset depreciation using SL, DB, DDB, or SYD methods.
Average Return Calculator
Calculate arithmetic mean, geometric mean (CAGR), and total return.
Margin Calculator
Find profit margin, markup percentage, or required selling price.
Discount Calculator
Find sale price, discount percentage, or original price.
Business Loan Calculator
Calculate business loan payments and effective APR with fees.
Debt-to-Income Calculator
Calculate your DTI ratio for mortgage and loan applications.
Real Estate Calculator
Analyze LTV, cap rate, GRM, cash-on-cash return, and break-even.
Take-Home Pay Calculator
Estimate net pay after federal, state, Social Security, and Medicare taxes.
Paycheck Calculator
Calculate net pay with federal tax, Social Security, Medicare, and state withholding.
W-4 Withholding Calculator
Determine optimal W-4 allowances for your desired refund or break-even goal.
Tax Refund Estimator
Estimate your federal tax refund or amount owed with full 1040-style calculation.
Tax Bracket Visualizer
Interactive chart showing your position in federal tax brackets with marginal rate.
Quarterly Tax Calculator
Calculate required estimated tax payments for freelancers with safe harbor analysis.
Tax Deduction Finder
Discover tax deductions you might be missing and estimate your tax savings.
State Tax Comparison
Compare total tax burden across US states including income and sales tax.
Credit Score Simulator
See how different financial decisions could impact your credit score.
Personal Loan Calculator
Compare personal loan payments across different terms.
Boat Loan Calculator
Calculate marine/boat loan payments with tax and term comparison.
Lease Calculator
Calculate lease payments for equipment or assets with residual value.
Refinance Calculator
Compare current vs. new mortgage and find your break-even point.
FHA Loan Calculator
Calculate FHA mortgage payments including mandatory MIP.
VA Mortgage Calculator
Calculate VA loan payments including the funding fee.
Home Equity Loan Calculator
Calculate home equity loan payments and available equity.
HELOC Calculator
Calculate HELOC draw period and repayment period payments.
Down Payment Calculator
Calculate down payment goal and monthly savings needed to reach it.
Percent Off Calculator
Find the sale price and savings for any percentage discount.
Tip Calculator
Calculate tip amount and split the bill among multiple people.
Net Worth Calculator
Calculate total net worth by summing assets and subtracting liabilities.
Rent Calculator
Estimate how much rent you can afford based on income, expenses, and the 30% rule.
Marriage Tax Calculator
Compare filing jointly vs. separately and find your marriage tax penalty or bonus.
Estate Tax Calculator
Estimate federal estate tax based on gross estate value and deductions.
Pension Calculator
Estimate pension balance at retirement based on salary, contributions, and growth.
Social Security Calculator
Estimate Social Security retirement benefit based on earnings and claiming age.
Annuity Calculator
Calculate the future value of an annuity with regular contributions and interest.
Annuity Payout Calculator
Calculate regular payout amounts from an annuity over a withdrawal period.
Cash Back or Low Interest
Compare a cash-back rebate versus low-interest financing to find the better deal.
Rent vs. Buy Calculator
Compare the total cost of renting versus buying a home over time.
Payback Period Calculator
Determine how long it takes for an investment to recoup its initial cost.
Present Value Calculator
Calculate the present value of a future sum discounted at a given rate.
Future Value Calculator
Calculate the future value of a present sum with contributions and compound interest.
Commission Calculator
Calculate sales commission, effective rates, and earnings for different structures.
Second Mortgage Calculator
Compare piggyback second mortgage vs PMI on a conventional loan.
Closing Costs Calculator
Estimate total closing costs for buying a home including lender fees and title insurance.
Loan-to-Value Calculator
Calculate your loan-to-value ratio to determine equity and borrowing capacity.
Jumbo Mortgage Calculator
Calculate monthly payments for jumbo loans that exceed conforming loan limits.
Super Jumbo Calculator
Calculate payments for luxury home loans exceeding $1 million.
Cost Per Square Foot Calculator
Calculate purchase price and annual costs per square foot for homes and commercial properties.
1031 Exchange Calculator
Calculate tax-deferred savings from a 1031 exchange.
Commercial Property Calculator
Calculate loan payments and analyze cash flow for commercial real estate investments.
Residential Income Calculator
Analyze profitability of rental properties and multi-family investments.
Net Seller Proceeds Calculator
Calculate how much money you will receive after selling your home.
HELOC Payment Calculator
Calculate Home Equity Line of Credit payments during draw and repayment periods.
UK Mortgage Calculator
Calculate monthly mortgage payments for UK homebuyers including stamp duty.
Canada Mortgage Calculator
Calculate mortgage payments for Canadian homebuyers including CMHC insurance.
Australia Mortgage Calculator
Calculate home loan repayments for Australian borrowers with LMI estimates.
Car Affordability Calculator
Determine how much car you can afford based on your monthly budget.
Bi-Weekly Car Payment Calculator
See how much you can save by making bi-weekly auto loan payments.
Vehicle Operating Cost Calculator
Calculate the true total cost of owning and operating a vehicle.
Bad Credit Auto Loan Calculator
Estimate loan payments and total costs with poor credit.
Auto Refinance Calculator
See how much you can save by refinancing your car loan to a lower rate.
Fuel Economy Calculator
Calculate fuel economy and compare costs between vehicles.
Compare Credit Cards Calculator
Compare multiple credit card offers side-by-side including APR and rewards.
Minimum Credit Card Payment Calculator
See the true cost of making only minimum payments.
Debt Goals Calculator
Create a personalized debt payoff plan with target dates.
Debt vs Investment Calculator
Compare the benefit of paying off debt versus investing.
Compare Financing Options Calculator
Compare personal loans, credit cards, and lines of credit.
Bad Credit Loan Calculator
Estimate loan payments and total costs with poor credit.
Line of Credit Payoff Calculator
Calculate how long it will take to pay off a revolving line of credit.
Savings Goals Calculator
Plan how much you need to save monthly to reach your target.
Required Monthly Savings Calculator
Calculate exactly how much you need to save each month.
College Savings Planner
Plan how much to save for your child's college education.
Salary Conversion Calculator
Convert your salary between hourly, weekly, bi-weekly, monthly, and annual.
Real Salary Calculator
Calculate your true hourly wage after accounting for commuting costs.
Opportunity Cost Calculator
See how small spending changes can make a big difference over time.
Lifetime Earnings Calculator
Estimate your total career earnings from starting salary to retirement.
Millionaire Calculator
Calculate how long it will take you to become a millionaire.
1040 Tax Calculator
Estimate your federal income tax based on filing status and income.
Self-Employment Tax Calculator
Calculate self-employment tax for freelancers and contractors.
Early Retirement Withdrawal Calculator
Calculate the cost of withdrawing from retirement accounts before age 59½.
Retirement Savings Duration Calculator
Calculate how long your retirement savings will last.
Percentage Calculator
Calculate percentage, percentage change, and percentage of a number.
Fraction Calculator
Add, subtract, multiply, and divide fractions with step-by-step solutions.
Scientific Calculator
Full scientific calculator with trig functions, logarithms, and more.
Basic Calculator
Simple four-function calculator for quick everyday arithmetic.
Average Calculator
Calculate the mean, weighted average, and geometric mean of any set of numbers.
Rounding Calculator
Round numbers to the nearest integer, decimal place, or significant figures.
Exponent Calculator
Calculate any base raised to any power, including negative and fractional exponents.
Root Calculator
Calculate square root, cube root, and nth root of any number.
Log Calculator
Calculate common log (log₁₀), natural log (ln), binary log (log₂), or any base.
Binary Calculator
Perform binary arithmetic and convert between binary, decimal, octal, and hex.
Hex Calculator
Perform hexadecimal arithmetic and convert between hex, decimal, binary, and octal.
Scientific Notation Calculator
Convert numbers to and from scientific notation and perform arithmetic.
Big Number Calculator
Perform arithmetic on arbitrarily large integers without precision loss.
Prime Factorization Calculator
Find all prime factors of a number and display them in exponential form.
Factor Calculator
Find all factors and factor pairs of any positive integer.
GCF Calculator
Find the Greatest Common Factor and LCM for a list of numbers.
LCM Calculator
Find the Least Common Multiple and GCF for a list of numbers.
Common Factor Calculator
Find all common factors shared by a set of numbers.
Long Division Calculator
Perform long division with step-by-step work shown for quotient and remainder.
Number Sequence Calculator
Generate arithmetic, geometric, Fibonacci, and prime sequences with nth term.
Percent Error Calculator
Calculate percent error, absolute error, and relative error between values.
Standard Deviation Calculator
Calculate population and sample standard deviation, variance, and mean.
Statistics Calculator
Comprehensive stats: mean, median, mode, quartiles, skewness, and kurtosis.
Mean, Median, Mode Calculator
Calculate mean, median, mode, and range for any data set.
Random Number Generator
Generate random integers, lists, or decimals within a custom range.
Sample Size Calculator
Determine required sample size for surveys based on confidence and margin of error.
Probability Calculator
Calculate single-event, multiple-event, and binomial probabilities.
Z-Score Calculator
Calculate z-scores and find probabilities and percentiles from normal distribution.
P-Value Calculator
Calculate p-values for Z-tests and T-tests, one-tailed and two-tailed.
Confidence Interval Calculator
Calculate confidence intervals for population mean and proportion.
Triangle Calculator
Solve any triangle (SSS, SAS, ASA) for sides, angles, area, and perimeter.
Right Triangle Calculator
Solve right triangles for sides, angles, area, and perimeter given any two values.
Pythagorean Theorem Calculator
Find the hypotenuse, a missing leg, or verify a right triangle.
Circle Calculator
Calculate radius, diameter, circumference, and area from any known circle value.
Area Calculator
Calculate area of squares, rectangles, triangles, circles, ellipses, and more.
Surface Area Calculator
Calculate surface area of 3D shapes: cube, sphere, cylinder, cone, and more.
Volume Calculator
Calculate volume of 3D shapes: cube, sphere, cylinder, cone, pyramid, and more.
Ratio Calculator
Simplify ratios, solve proportions, and scale ratios up or down.
Distance Calculator
Calculate distance between two points in 2D or 3D space with midpoint and slope.
Slope Calculator
Calculate slope, y-intercept, angle, and percent grade from two points.
Quadratic Formula Calculator
Solve quadratic equations showing real/complex roots, vertex, and discriminant.
Matrix Calculator
Perform matrix addition, subtraction, multiplication, determinant, and inverse.
Half-Life Calculator
Calculate remaining quantity, time elapsed, or half-life from radioactive decay.
Permutation & Combination Calculator
Calculate permutations P(n,r) and combinations C(n,r) using factorials.
Calorie Calculator
Calculate your daily calorie needs based on BMR and activity level using the Mifflin-St Jeor equation.
Body Fat Calculator
Estimate body fat percentage using U.S. Navy method or BMI-based calculations with category classification.
BMR Calculator
Calculate your Basal Metabolic Rate using the Mifflin-St Jeor equation. Supports metric and imperial units.
Ideal Weight Calculator
Calculate ideal weight ranges using Robinson, Miller, Devine, Hamwi formulas and BMI-based ranges.
Pace Calculator
Calculate running pace, time, and distance. Includes pace chart and supports various activities.
Pregnancy Calculator
Calculate due date, gestational age, and pregnancy milestones using LMP or conception date.
Conception Calculator
Estimate conception date and fertile window based on due date, LMP, or ultrasound measurements.
Due Date Calculator
Calculate estimated due date using LMP, conception date, or IVF transfer date methods.
Sleep Calculator
Calculate optimal sleep duration based on age and wake time. Includes sleep cycle analysis.
Lean Body Mass Calculator
Calculate lean body mass and body fat percentage using various formulas.
Healthy Weight Calculator
Calculate healthy weight ranges using multiple methods and BMI standards.
Calories Burned Calculator
Calculate calories burned for various activities based on weight and duration.
Army Body Fat Calculator
Calculate body fat percentage using U.S. Army circumference method.
One Rep Max Calculator
Calculate one rep max and training percentages using multiple formulas.
Age Calculator
Calculate exact age in years, months, days, hours, minutes, seconds. Find time between any two dates.
Date Calculator
Add or subtract days, weeks, months, years from any date. Calculate date differences and weekdays.
Time Calculator
Add or subtract time values in hours, minutes, seconds. Convert between time formats.
Hours Calculator
Calculate hours between two times. Track work hours, overtime, breaks, and pay calculations.
Day Counter
Calculate days between dates, countdown to events, or count up from a specific date.
Day of Week Calculator
Find what day of the week any date falls on, past or future.
Time Zone Calculator
Convert time between different time zones worldwide.
GPA Calculator
Calculate Grade Point Average for high school, college, or university. Supports 4.0, 5.0, and percentage scales.
Grade Calculator
Calculate weighted grade average, final exam score needed, or overall course grade with breakdowns.
Concrete Calculator
Calculate concrete volume needed for slabs, footings, columns, and stairs. Get bag estimates.
Base64 Encode/Decode
Encode or decode text and files to/from Base64 format.
URL Encode/Decode
Encode or decode URLs and query parameters for web use.
Roman Numeral Converter
Convert between Roman numerals and Arabic numbers.
Square Footage Calculator
Calculate area in square feet for rooms, houses, and properties.
Stair Calculator
Calculate stair dimensions, riser height, tread depth, and stringer length.
Roofing Calculator
Calculate roofing materials, shingles, and underlayment needed.
Tile Calculator
Calculate number of tiles needed for floors, walls, and backsplashes.
Mulch Calculator
Calculate mulch volume needed for garden beds and landscaping.
Gravel Calculator
Calculate gravel volume needed for driveways, paths, and drainage.
Tire Size Calculator
Compare tire sizes, calculate dimensions, speedometer error, and fitment.
Horsepower Calculator
Calculate horsepower using various methods: ET, torque, drag racing, and power conversion.
Wind Chill Calculator
Calculate wind chill temperature based on air temperature and wind speed.
Heat Index Calculator
Calculate heat index (feels like temperature) based on temperature and humidity.
Dew Point Calculator
Calculate dew point temperature based on temperature and relative humidity.
BTU Calculator
Calculate BTU requirements for heating and cooling systems by room size.