Calcora is a small, focused set of calculators for loans, tax, health and everyday math — each one built to be exact, explained in plain language, and free to use for as long as you need it.
A taste of what's inside — open the full EMI calculator for amortization details.
Every tool below opens instantly, works offline once loaded, and explains its own math — no account, no email wall.
Work out your fixed monthly payment on any loan from the amount, rate and term.
Open calculatorSee how savings or investments grow when returns are added back and compounded.
Open calculatorQuick, exact simple interest on a principal over any rate and time period.
Open calculatorAdd or remove tax from a price and see the base amount and tax split clearly.
Open calculatorFind the final price, amount saved, and effective discount rate in one step.
Open calculatorSolve any percentage question: of a number, change between two numbers, or ratio.
Open calculatorConvert length between metric and imperial units instantly, both directions.
Open calculatorSplit a bill and work out a fair tip for any group size in a couple of taps.
Open calculatorChoose the tool that matches what you're figuring out — finance, health or a quick everyday sum.
Fill in the fields on that page. Nothing you type ever leaves your browser or gets stored on a server.
Get the result plus the supporting figures, so you understand how the number was reached, not just what it is.
Most calculator sites optimize for ad density. We optimized for getting the number right and explaining it — each tool includes the underlying formula, a short walkthrough, and answers to the questions people actually ask us.