Calculators

Generate random numbers online, free, within a custom range — one or many at once.

Roll virtual dice online, free — choose how many dice and how many sides.

Flip a virtual coin online, free — heads or tails, instantly, with a running tally.

Calculate aspect ratio online, free — find a ratio, or resize keeping the same proportions.

Calculate fractions online, free — add, subtract, multiply, or divide with simplified results.

Simplify ratios and find equivalent ratios online, free.

Calculate the mean, median, and mode of a set of numbers online, free.

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

Calculate the square root and cube root of any number online, free.

Calculate a number raised to a power online, free.

Calculate the LCM (Least Common Multiple) and GCD (Greatest Common Divisor) of numbers online, free.

Calculate compound interest online, free — see your investment grow with annual, monthly, or daily compounding.

Calculate simple interest online, free, on any principal amount.

Calculate SIP returns online, free — see how monthly investments grow over time.

Calculate ROI (Return on Investment) online, free.

Find your real selling price — cost, ads, fees, tax and profit

Hourly rate, project quote and subscription pricing

Calculate profit margin and markup percentage online, free.

Calculate discount amount and final sale price online, free.

Calculate GST or VAT online, free — add or remove tax from a price.

Calculate tip amount and split the bill online, free.

See the current time in Pakistan, UK, USA, and other major time zones online, free, updated live.

Free online stopwatch with lap timing.

Free online countdown timer — set hours, minutes, and seconds, get alerted when time is up.

Count down the days until any future date online, free.

Convert Unix timestamp to date, or date to Unix timestamp, online, free.

Calculate working days between two dates online, free, excluding weekends.

Find the ISO week number for any date online, free.

Free online scientific calculator with trigonometry, logarithms, powers, and roots.

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

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

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

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

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

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