Free Online Calculators

Instant, accurate calculators for money, studies and health — EMI, SIP, GST, interest, percentage, CGPA, age and TDEE. Free and private to your browser.

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EMI Calculator
Home, car & personal loan EMI.
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SIP Calculator
Mutual fund SIP returns.
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GST Calculator
Add or remove GST (CGST/SGST).
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Interest Calculator
Simple & compound interest.
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Percentage Calculator
Find %, of, increase/decrease.
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Marks % & CGPA
Marks %, CGPA ↔ percentage.
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TDEE Calculator
Daily calories to maintain, lose or gain.

Quick answers for money, studies and health

These calculators give you an instant, accurate answer without spreadsheets or formulas. For money, plan a loan with the EMI Calculator, project mutual fund returns with the SIP Calculator, work out tax with the GST Calculator, and compare simple and compound interest.

For studies and everyday maths, the Percentage Calculator and Marks % & CGPA Calculator handle exam scores, while the Age Calculator finds your exact age as on any cut-off date — useful for checking exam eligibility. For health, the TDEE Calculator estimates your daily calorie needs. Each one recalculates instantly in your browser, with nothing uploaded.

Frequently asked questions

Are these calculators accurate?
Yes. Each calculator uses the standard formula for its purpose — for example Mifflin–St Jeor for TDEE and the reducing-balance formula for EMI — and recalculates instantly as you change the inputs.
Do the calculators work offline / privately?
All calculations run in your browser, so nothing you enter is sent to a server. Once the page has loaded, the maths happens entirely on your device.
Which calculator should I use for a loan?
Use the EMI Calculator to find your monthly instalment, total interest and total payment for a home, car or personal loan. Pair it with the Interest Calculator to compare simple and compound interest.
Are the calculators free?
Yes, every calculator is completely free with no sign-up and no limits on how often you use it.

Explore more free tools

Every ToolsKaro tool is free, needs no sign-up and runs entirely in your browser.

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