Calculate, convert units, solve equations and math problems.
Every Math tool — free, no sign-up, and nothing to install.
Work out a percentage of a number, what percentage one number is of another, or the original figure behind a percentage — three calculators in one.
Increase or decrease a number by a percentage, or find the percentage change between two figures — with the direction and the absolute difference shown.
Work out the sale price and what you save, find the discount percentage from two prices, or combine two stacked discounts correctly.
Add GST to a base amount or strip it out of a GST-inclusive price, across all Indian slabs, with the CGST and SGST split shown.
Calculate simple interest on a principal, or work backwards to the rate or principal, with the total repayable and the yearly interest shown.
See how a lump sum or a monthly deposit grows, with yearly, quarterly, monthly or daily compounding and the effective annual rate.
Calculate your monthly EMI, total interest and total repayable for a home, car or personal loan — or work out what loan your budget supports.
Find your profit margin and markup from cost and selling price, or work out the price you need to charge to hit a target margin.
Calculate your Body Mass Index in metric or imperial units, with the WHO weight category and the healthy weight range for your height.
Calculate sample or population standard deviation with the variance, mean, standard error and coefficient of variation shown alongside.
Work out the true cost of a loan including processing fees and charges, and see how much of an early EMI is interest rather than principal.
Convert numbers to Roman numerals and Roman numerals back to numbers, with strict validation of the notation rules.
Calculate your GPA from letter grades and credit hours, or from grade points on any scale, with the weighted and unweighted averages side by side.
Generate random numbers in any range — one or thousands, whole or decimal, with or without repeats — drawn in your browser.
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