Three calculators for everyday sums, with answers that update as you type: an age calculator for your exact age on any date, a percentage calculator for GST, discounts and marks, and a unit converter that includes Indian land units such as gaj and guntha. Everything is worked out in your browser.
How to use Calculators
Choose a calculator below, or press Ctrl+K anywhere and type its name.
Enter your numbers or dates. The answer appears straight away, with the formula or the steps behind it.
Use the copy buttons to take an answer with you.
Frequently asked questions
Are these calculators free?
Yes. There is no account, no sign-up and no limit.
Is anything I enter sent to a server?
No. The sums run in your browser. Your last inputs, such as the date of birth in the age calculator, are remembered in this browser's local storage only.
How do I check my age for an exam or job form?
Open the age calculator, enter your date of birth, and set Age as on to the cut-off date in the official notice. It shows your exact age in years, months and days on that date. The age limits themselves, and any relaxation, are set by each notice, so compare the result with the notice.
Do they work on a phone?
Yes. Every calculator fits a phone screen, and once loaded it works without a connection.
What each calculator does
Age Calculator: exact age in years, months and days on today's date or any other, the same age in total months, weeks and days, the next birthday and the day of the week you were born.
Percentage Calculator: X% of Y, what percent X is of Y, percentage increase or decrease, adding or removing a percentage such as 18% GST, and marks percentage.
Unit Converter: length, weight, temperature, area, volume, speed, time and data size, with exact factors, sq ft, gaj, cent, guntha and acre, and KB versus KiB.