Most Popular Tools

Calculate mortgage payments with taxes, insurance, PMI, and amortization

Calculate your Body Mass Index with visual BMI scale

Calculate daily calories (TDEE/BMR) with macro breakdowns for your goals

Calculate compound interest with contributions and visual growth chart

Convert salary between hourly, weekly, monthly, and annual with tax estimates

Calculate monthly payments, interest, and amortization schedules

Estimate US federal income tax with brackets, FICA, and take-home pay

Calculate tips, split bills, and round totals with tipping guide

Calculate semester and cumulative GPA with course management

Calculate exact age in years, months, and days

Calculate percentages, increases, decreases, and changes

Estimate retirement savings, income, and how much to save monthly

Format, validate, and beautify JSON data

Generate MD5, SHA-1, SHA-256, and other hashes

Test and debug regular expressions in real-time

Generate unique UUIDs and GUIDs

Decode and inspect JSON Web Tokens

Compare two texts and find differences

Count words, characters, sentences, and paragraphs

Write and preview Markdown in real-time

Generate stylish Unicode text for social media and bios

Generate QR codes for URLs, text, WiFi, and more

Generate strong, secure passwords

Calculate your Body Mass Index with visual BMI scale

Calculate daily calories (TDEE/BMR) with macro breakdowns for your goals

Calculate daily protein, carbs, and fat needs for your fitness goal

Calculate your Total Daily Energy Expenditure based on BMR, activity level, and body composition

Estimate body fat percentage using the US Navy method and BMI formula

Calculate ideal body weight using Devine, Robinson, Miller, and Hamwi formulas

Calculate pregnancy due date or project deadline with timeline

Calculate mortgage payments with taxes, insurance, PMI, and amortization

Calculate compound interest with contributions and visual growth chart

Calculate monthly payments, interest, and amortization schedules

Convert salary between hourly, weekly, monthly, and annual with tax estimates

Estimate US federal income tax with brackets, FICA, and take-home pay

Estimate retirement savings, income, and how much to save monthly

Calculate return on investment, annualized ROI, and compare investments

Calculate your total net worth from assets minus liabilities

Calculate gross and net profit margins with markup comparison

Convert between 30+ world currencies with multi-currency comparison

Convert between length, weight, temperature, speed, and more

Convert between binary, octal, decimal, and hexadecimal

Roll any combination of dice — D4, D6, D8, D10, D12, D20, and D100 for tabletop games.

Flip a virtual coin with animated results — heads or tails, with history tracking.

Precise online stopwatch with lap times, split tracking, and full-screen mode.

Fun love compatibility calculator — enter two names and discover your compatibility score!

Generate random names for babies, usernames, businesses, fantasy characters, and pets.

Generate cryptographically secure random numbers, dice, and coins

Analyze what your internet speed can handle — streaming, gaming, video calls, and more.

Multiple countdown timers with progress rings and fullscreen mode