Free Online Calculators

120 free calculators for tax, loans, investments, education, health, maths and everyday use.

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Education & Students 12

Income Tax, Salary & GST 18

Investment & Savings 24

Loans & EMI 11

Business & Property 7

Percentage & Math 10

Health & Fitness 12

Date & Time 6

Unit Converters 19

Other Tools 1

MasterCalc app: install all calculators on your phone or computer. Works offline, no app store needed.

About MasterCalculator.in

MasterCalculator.in is a one-stop destination for accurate and easy-to-use online calculators for students, professionals, investors and everyday users. Whether you're working out your finances, health or a maths problem, there's a tool for you.

Every calculator works the same way: enter your values on the left, press Calculate, and read the result on the right, with the formula and a detailed breakdown where it helps. The calculators work on any phone, tablet or computer and give instant results without sign-up.

With a strong focus on Indian tax laws, banking practices, salary structures and local standards, MasterCalculator.in keeps every tool up to date, relevant and trustworthy.