Free Tools & Calculators

Health & Fitness

BMI Calculator

Calculate your Body Mass Index and see if you're at a healthy weight.

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Text Tools

Word Counter

Count words, characters, sentences, and paragraphs.

Use Tool 92 uses

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Developer Tools

JSON Formatter

Format, validate, and beautify JSON data.

🎂

Date & Time

Age Calculator

Calculate your exact age in years, months, and days.

Use Tool 97 uses

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Financial

Currency Converter

Convert between world currencies with live exchange rates.

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Converters

Length Converter

Convert between metric and imperial length units.

Use Tool 98 uses

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Design & CSS

Color Picker

Pick colors and get HEX, RGB, and HSL values.

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Math & Education

Scientific Calculator

Full-featured scientific calculator with advanced functions.

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Financial

US Salary Calculator

Comprehensive salary calculator with federal/state taxes, FICA, 401(k), health insurance, HSA/FSA, and take-home pay breakdown.

Use Tool 131 uses

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Health & Fitness

Calorie Calculator

Calculate your daily calorie needs for weight goals.

Converters

Weight Converter

Convert between kilograms, pounds, and other weight units.

Use Tool 88 uses

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Financial

US Income Tax Calculator

Calculate your US federal and state income tax, FICA taxes, and take-home pay with support for different filing statuses and 401(k) contributions.

Use Tool 118 uses

Financial

Financial calculators and tools for budgeting, investments, taxes, loans, and money management.

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💱

Currency Converter

Convert between world currencies with live exchange rates.

💰

US Salary Calculator

Comprehensive salary calculator with federal/state taxes, FICA, 401(k), health insurance, HSA/FSA, and take-home pay breakdown.

Use Tool 131 uses

🧾

US Income Tax Calculator

Calculate your US federal and state income tax, FICA taxes, and take-home pay with support for different filing statuses and 401(k) contributions.

Use Tool 118 uses

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US Mortgage Calculator

Calculate mortgage payments with PMI, property tax, homeowners insurance, HOA fees, and see how extra payments save you money.

Use Tool 106 uses

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Loan Calculator

Calculate loan repayments for personal and car loans.

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Compound Interest Calculator

Calculate compound interest growth over time.

Use Tool 86 uses

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Investment Calculator

Project your investment growth with regular contributions.

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Savings Calculator

Plan your savings goals and see how quickly you can reach them.

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Health & Fitness

Health and fitness calculators for BMI, calories, macros, heart rate, and wellness tracking.

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BMI Calculator

Calculate your Body Mass Index and see if you're at a healthy weight.

🔥

Calorie Calculator

Calculate your daily calorie needs for weight goals.

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BMR Calculator

Calculate your Basal Metabolic Rate.

Use Tool 85 uses

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Macro Calculator

Calculate your ideal protein, carbs, and fat macros.

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Protein Calculator

Calculate your daily protein needs.

Use Tool 73 uses

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Body Fat Calculator

Estimate your body fat percentage.

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Ideal Weight Calculator

Calculate your ideal body weight based on height.

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Water Intake Calculator

Calculate how much water you should drink daily.

Use Tool 78 uses

View all Health & Fitness tools

Converters

Unit converters for length, weight, temperature, volume, area, speed, and more.

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📐

Length Converter

Convert between metric and imperial length units.

Use Tool 98 uses

Weight Converter

Convert between kilograms, pounds, and other weight units.

Use Tool 88 uses

🌡️

Temperature Converter

Convert between Celsius, Fahrenheit, and Kelvin.

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Volume Converter

Convert between liters, gallons, and other volume units.

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Area Converter

Convert between square meters, acres, and other area units.

Use Tool 85 uses

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Speed Converter

Convert between km/h, mph, and other speed units.

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Time Converter

Convert between hours, minutes, seconds, and more.

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Data Storage Converter

Convert between bytes, KB, MB, GB, TB, and more.

Use Tool 76 uses

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Design & CSS

Design tools and CSS generators for colors, gradients, shadows, borders, and visual effects.

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Color Picker

Pick colors and get HEX, RGB, and HSL values.

🌈

Color Converter

Convert between HEX, RGB, HSL, and other color formats.

🖌️

Gradient Generator

Create beautiful CSS gradients with custom colors.

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Color Palette Generator

Generate harmonious color palettes for your designs.

Use Tool 88 uses

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Box Shadow Generator

Create CSS box shadows with visual controls.

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Border Radius Generator

Create CSS border-radius with individual corner controls.

Use Tool 76 uses

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PX to REM Converter

Convert between pixels and rem units for CSS.

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PX to EM Converter

Convert between pixels and em units for CSS.

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Developer Tools

Developer utilities for encoding, hashing, formatting, regex testing, and code generation.

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JSON Formatter

Format, validate, and beautify JSON data.

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Base64 Encoder/Decoder

Encode and decode text to/from Base64.

Use Tool 77 uses

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URL Encoder/Decoder

Encode and decode URLs and query strings.

Use Tool 77 uses

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HTML Encoder/Decoder

Encode and decode HTML entities.

Use Tool 114 uses

#️⃣

Hash Generator

Generate MD5, SHA-1, SHA-256, and other hash values.

Use Tool 78 uses

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Password Generator

Generate secure random passwords.

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UUID Generator

Generate unique UUIDs (v1, v4) for development.

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Regex Tester

Test and debug regular expressions.

View all Developer Tools tools

Math & Education

Math calculators and educational tools for fractions, percentages, GPA, statistics, and more.

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🧮

Scientific Calculator

Full-featured scientific calculator with advanced functions.

➗

Fraction Calculator

Add, subtract, multiply, and divide fractions.

Ratio Calculator

Calculate ratios, proportions, and scaling.

Use Tool 86 uses

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GCD & LCM Calculator

Find the Greatest Common Divisor and Least Common Multiple.

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Prime Number Checker

Check if a number is prime and find prime factors.

Use Tool 83 uses

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Random Number Generator

Generate random numbers within a range.

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Number Base Converter

Convert between binary, decimal, hex, and octal.

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Roman Numeral Converter

Convert between Roman numerals and Arabic numbers.

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Date & Time

Date and time tools for age calculation, countdowns, time zones, timestamps, and scheduling.

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🎂

Age Calculator

Calculate your exact age in years, months, and days.

Use Tool 97 uses

📆

Date Difference Calculator

Calculate the number of days between two dates.

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Date Add/Subtract

Add or subtract days, weeks, months from a date.

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Timezone Converter

Convert times between different time zones.

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Unix Timestamp Converter

Convert between Unix timestamps and human dates.

Use Tool 93 uses

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Week Number Calculator

Find the week number for any date.

Use Tool 81 uses

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Countdown Timer

Create countdowns to important dates and events.

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Stopwatch

Online stopwatch with lap times.

Use Tool 67 uses

Text Tools

Text utilities for word counting, case conversion, encoding, formatting, and text manipulation.

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Word Counter

Count words, characters, sentences, and paragraphs.

Use Tool 92 uses

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Character Counter

Count characters with and without spaces.

Use Tool 86 uses

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Case Converter

Convert text to uppercase, lowercase, title case, and more.

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Lorem Ipsum Generator

Generate placeholder text for designs and layouts.

Use Tool 93 uses

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Slug Generator

Convert text to URL-friendly slugs.

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Text Diff Checker

Compare two texts and highlight differences.