Calculators

Random Number Generator

Generate random numbers within a custom range

Dice Roller

Roll virtual dice with custom sides and count

Coin Flip

Flip a virtual coin — heads or tails

Aspect Ratio Calculator

Calculate aspect ratio and proportional resize dimensions

Fraction Calculator

Add, subtract, multiply, or divide fractions

Ratio Calculator

Simplify ratios and find equivalent ratios

Average Calculator

Find the mean, median, and mode of a set of numbers

Prime Number Calculator

Check if a number is prime, or list primes up to a limit

Square Root Calculator

Calculate the square root and cube root of a number

Exponent Calculator

Calculate a number raised to a power

LCM & GCD Calculator

Find the least common multiple and greatest common divisor

Compound Interest Calculator

See how an investment grows with compound interest

Simple Interest Calculator

Calculate simple interest on a principal amount

SIP Calculator

Calculate returns on a monthly Systematic Investment Plan

ROI Calculator

Calculate Return on Investment as a percentage

Profit Margin Calculator

Calculate profit margin and markup percentage

Discount Calculator

Calculate final price and savings after a discount

GST / VAT Calculator

Add or remove GST/VAT from a price

Tip Calculator

Calculate a tip and split the bill among a group

World Clock

Current time across major time zones, updated live

Stopwatch

Online stopwatch with lap timing

Countdown Timer

Set a timer and get alerted when time is up

Days Until Date

Count down the days until any future date

Unix Timestamp Converter

Convert between Unix timestamp and human-readable date

Working Days Calculator

Calculate business days between two dates, excluding weekends

Week Number Calculator

Find the ISO week number for any date

Scientific Calculator

Online scientific calculator with trigonometry and logarithms

Percentage Calculator

Calculate percentages online, free — find what X% of a number is, or what percentage one number is of another.

Age Calculator

Calculate your exact age in years, months, and days online, free, based on your date of birth.

BMI Calculator

Calculate your Body Mass Index (BMI) online, free, from your height and weight. A general health screening indicator.

Unit Converter

Convert between units of length, weight, and temperature online, free. Fast, accurate conversions.

Date Difference Calculator

Calculate the number of days, months, or years between two dates online, free.

Loan / EMI Calculator

Calculate your loan EMI (monthly installment) online, free. Enter loan amount, interest rate, and tenure.