Home

Enter your height and weight to instantly calculate BMI and determine your weight status

Calculate monthly payments, total interest, and amortization schedule

Quickly calculate percentages, percentage changes, and discount amounts

Free online Date Calculator — instantly find how many days, weeks, and months between two dates. Add or subtract days to get a new date. Countdown timer, date difference & more!

Enter your birthday to calculate your exact age in years, months, and days

Calculate tip amount and split the bill among people with custom tip percentage

Calculate price with tax, without tax, and tax amount with custom tax rate

Calculate your Basal Metabolic Rate based on gender, age, height, and weight

Calculate Total Daily Energy Expenditure based on activity level

Enter your birthday to find your sun sign, optionally enter birth time for an approximate rising sign

Calculate the number of business days between two dates, or find the date after N business days

Enter temperature, wind speed, and humidity to calculate wind chill and heat index for real feels-like temperature

Estimate your Blood Alcohol Concentration (BAC) using the Widmark formula based on weight, gender, drinks, and time

Calculate the final amount and total interest for compound interest investments with various compounding frequencies

Convert between cm, m, inches, feet, km, miles and more

Convert between grams, kg, pounds, ounces and more

Convert between Celsius, Fahrenheit, and Kelvin instantly

Convert between world timezones, select cities to see corresponding times

Quickly convert between pounds (lb) and kilograms (kg), with a handy weight reference table

Convert between Unix timestamps and human-readable dates, with live current timestamp display

Convert between Bit, Byte, KB, MB, GB, TB, and PB data storage units instantly

Convert between feet/inches and centimeters with a common height reference table

Format, beautify, validate, and minify JSON data with real-time syntax error highlighting

Encode text to Base64 or decode Base64 to text with full UTF-8 support

Convert text case: uppercase, lowercase, title case, sentence case and more

Count words, characters, paragraphs, and estimate reading time

Free online Character Counter — instantly count characters, words, sentences, paragraphs & lines with and without spaces. Perfect for Twitter, essays & SEO meta tags!

Convert between HEX, RGB, and HSL color codes with live preview

Convert HEX color codes to RGB values, supports 3-digit and 6-digit formats

Convert RGB color values to HEX codes with live color preview

Convert between HSL, HEX, and RGB color codes with live preview

Interactive color picker — drag to select colors and get HEX, RGB, HSL codes

Generate CSS linear and radial gradients with live preview and copy CSS code

Free online Password Generator — instantly create strong, random passwords with custom length, uppercase, lowercase, numbers & symbols. No data stored, 100% secure!

Enter text or URL to generate QR Code, download as PNG image

Use your phone's accelerometer to detect tilt angle, simulating a bubble level for hanging pictures and aligning objects

Measure ambient noise levels in real-time using your phone's microphone, with noise level reference chart

Visually compare common sound decibel levels and understand how noise affects hearing

Use your phone's camera to magnify objects, perfect for reading small text and observing details

Precise metronome with adjustable BPM and time signature, perfect for music practice

Use your phone's magnetometer to display heading and cardinal directions for outdoor navigation

Use your phone's vibration motor for massage with adjustable frequency and patterns