Fast, accurate calculators for everyday life
Percentage, BMI, loan EMI, SIP, GST or sales tax, salary, income tax and more. Pick your country and see results instantly.
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- Works on every device
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Put two options side by side and see which costs less. Choose your country, enter your numbers, and the results update as you type.
Your numbers
Estimates for planning and learning, not tax, legal or investment advice. Check the official source or a qualified professional before you decide.
Guides and articles
Short, practical guides to help you understand your numbers.
How to Calculate Percentage Easily, With Examples
The three formulas you need for discounts, marks, tips and price changes, with worked examples.
Read article → HealthUnderstanding Your BMI: What the Numbers Really Mean
How BMI is worked out, what each range means and where the measure falls short.
Read article → TaxIncome Tax Slabs Explained: USA and India
How progressive tax brackets work, with current rates and a worked example for each country.
Read article →Why people use CalcNest
Clear formulas
Every calculator explains how the answer is worked out.
Private
Your numbers stay in your browser. We do not store them.
USA and India
Currency, tax rules and examples change with your country.
Always free
No sign-up, no downloads. Works on phone, tablet, laptop and TV.
Frequently asked questions
Yes. All calculators are free, need no sign-up and can be used as many times as you like.
Calculators use standard formulas and the latest tax rates we could verify. Tax and salary results are estimates. Always check with an official source or a qualified professional before making financial decisions.
No. Calculations run in your own browser. The numbers you type are not sent to or stored on our servers.
You can switch between the USA and India using the country buttons on the calculator. Currency, tax rules and examples update automatically.
Yes. The site is designed for phones, tablets, laptops, desktops and large screens.
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