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Free calculators for loans, interest, savings and tax

Fast, accurate calculators for EMI, simple and compound interest, FD and RD returns, GST and percentages, with the formula shown every time.

Calculators we're building

We show our working

Every result comes with the formula used, so you can check it yourself. For example, a loan EMI is calculated as:

EMI = P × r × (1 + r)^n ÷ ((1 + r)^n − 1)

where P is the loan amount, r is the monthly interest rate (annual rate ÷ 12 ÷ 100) and n is the number of monthly instalments.

Fast and private

The calculators will run in your browser. There is no sign-up, and your numbers are not stored.