Free Online Tools and Calculators

Percentage Calculator

Calculate any percentage instantly

BMI Calculator

Check your Body Mass Index in seconds

Body Fat Calculator

US Navy method: body fat percentage from tape measurements

Ideal Weight Calculator

Find your ideal body weight for your height

Daily Calorie Calculator

Find your daily calorie needs (TDEE)

Calories Burned Calculator

How many calories an activity burns for your weight

BMR Calculator

Find your Basal Metabolic Rate

FFMI Calculator

Fat-Free Mass Index calculator for men and women

One Rep Max Calculator

Estimate your 1RM from a weight and reps

Running Pace Calculator

Pace per km and mile from your distance and time

Water Intake Calculator

How much water you should drink each day

Macro Calculator

Find your daily protein, carbs and fat

Pregnancy Calculator

Find your due date and pregnancy week

Ovulation Calculator

Find your ovulation day and fertile window

Period Calculator

Predict your next period and a 6-month cycle calendar

Lean Body Mass Calculator

Find your lean mass and lean percentage

Sleep Calculator

Ideal bedtimes and wake-up times based on 90-minute cycles

Dog & Cat Age Calculator

Your pet's age in human years, by breed size

Date Difference

Calculate the time between two dates

Age Calculator

Find your exact age from your birth date

Date Calculator

Add days, weeks, months or years to a date

Day Counter

How many days until — or since — a date

Week Number

What week of the year is it?

Day of the Week

Which weekday does a date fall on?

Zodiac Sign Calculator

Your star sign and Chinese zodiac from your birthday

Birthday Countdown

How many days until your next birthday — with a live countdown

VAT Calculator

Find amounts with and without VAT

Discount Calculator

Find the sale price and what you save

Unit Price Comparison

Compare two products by price per unit and see which is cheaper

Compound Interest Calculator

See how your money grows over time

Interest Calculator

Gross interest, tax and net return at maturity

Turkey Net-Gross Salary

2026 Türkiye: gross to net, net to gross

Loan Calculator

Monthly payment, total interest and amortization schedule

Mortgage Calculator

Down payment, monthly payment and amortization

Fuel Cost Calculator

Trip cost from distance, consumption and price

Tip Calculator

Calculate the tip and split the bill in seconds

Rule of Three Calculator

Find the unknown in direct and inverse proportions

GCD and LCM Calculator

Greatest common divisor and least common multiple with prime factors

Fraction Calculator

Four operations, simplifying and decimal to fraction

Multiplication Table

Interactive chart, quiz and printable

Grade Calculator

Weighted average and GPA on any scale

Pomodoro Timer

Boost productivity with focused work sessions

Clock

Live clock display

World Clock

Live local time in cities around the world

Time Zone Converter

Convert a time between two cities and plan meetings across zones

Countdown Timer

Count down to any event or deadline

Time Calculator

Duration between times, and add or subtract time

Online Stopwatch

Precise stopwatch with lap time tracking

Chess Clock

Game timer with time controls

Online Metronome

30–250 BPM, time signature, accent and tap tempo

Reaction Time Test

Click as soon as the box turns green

Shot Timer

Start beep, microphone detection, first shot and split times

Password Generator

Create strong, secure passwords instantly

QR Code Generator

Create custom QR codes instantly

QR Code Reader

Scan a QR code from an image or your camera

Wheel of Fortune

Fun spinning wheel for random selection

Dice Roller

Roll virtual dice for games and decisions

Random Number Generator

Generate random numbers instantly

Coin Flip

Fair and truly random: flip a coin online

Lottery Number Generator

Random lines for Powerball, Mega Millions, EuroMillions and custom games

Signature Generator

Type or draw a signature and download it as a transparent PNG

Random Name Picker

Draw a fair winner or split a group into random teams

Secret Santa Generator

Add names, run the draw and send everyone their own secret link

Unit Converter

Convert between units instantly

Size Converter

Convert clothing and shoe sizes between EU, US, UK and more

Roman Numeral Converter

Numbers to Roman numerals and back

Number to Words

Spell out any number in words

Morse Code Translator

Text ↔ Morse code with audio playback and chart

Word Counter

Count words, characters and more as you type

Character Counter

Count characters, words and lines as you type

Case Converter

Convert text into different letter cases

Font Generator

Fancy text styles for Instagram, TikTok and bios

Lorem Ipsum Generator

Placeholder text for designs and templates

Text Compare

Find the differences between two texts line by line

Text to Speech

Paste text and listen to it read aloud

Readability Checker

Flesch score, grade level and your longest sentences

Word Cloud Generator

Turn any text into a beautiful word cloud — free PNG & SVG

Typing Speed Test

How many words per minute can you type?

Remove Duplicate Lines & Sort

Clean up any list: unique lines, sorted the way you want

Image Compressor

Shrink image size with controlled quality loss

Image Resizer

Change an image's pixel dimensions with locked aspect ratio

Crop Image

Crop photos to any size or ratio, square or circle — right in your browser

Image Converter

Convert between PNG, JPG and WebP instantly

Add Watermark to Image

Protect your photos with a text or logo watermark — right in your browser

Favicon Generator

Create a favicon from text, emoji or an image and download the full icon set

Microphone Test

Live level meter, waveform, recording and playback

Webcam Test

Live preview, real resolution, frame rate and snapshot

Keyboard Test

Press each key — tested keys turn green

Dead Pixel Test

Full-screen colours to find dead and stuck pixels

Speaker Test

Left / right channels, frequency sweep and tone generator

Decibel Meter

Approximate dB level with your microphone

Merge PDF

Combine multiple PDFs into one file

Split PDF

Extract a page range as a separate PDF

JPG to PDF

Turn images into one PDF — each image becomes a page

Rotate PDF

Rotate all pages by 90°, 180° or 270°

JSON Formatter

Validate, beautify or minify JSON

Base64 Encoder

Encode text to Base64 or decode it back

Hash Generator

Compute SHA-256, SHA-512 and SHA-1 digests instantly

UUID Generator

Generate random v4 UUIDs in bulk

Timestamp Converter

Unix timestamp ↔ human-readable date

Color Converter

Convert between HEX, RGB and HSL instantly

Color Palette Generator

Harmonious color schemes or a palette extracted from your image

PX to REM Converter

Pixels ⇄ rem with any root font size

Number Base Converter

Binary, octal, decimal, hex and any base 2–36 — plus text ↔ binary

Sudoku

Classic sudoku puzzle in 3 difficulties

Snake

The classic snake game in 3 speeds

2048

Slide the tiles, merge equal numbers and reach 2048

Minesweeper

The classic mine-hunting puzzle in 3 sizes

Memory

Flip the cards and match the pairs in 3 sizes