Toolnest
Finance
July 3, 2026·4 min read

How to Calculate Your Loan EMI (With a Simple Example)

Understand exactly how your monthly loan payment is worked out, what drives the total interest, and how to estimate it in seconds.

EMI stands for Equated Monthly Instalment — the fixed amount you pay your lender every month until a loan is fully repaid. Knowing how it's calculated helps you compare offers and avoid surprises.

The formula

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 payments.

A worked example

Borrow 20,000 at 7.5% annual interest over 5 years (60 months). The monthly rate is 0.625%. Plugging the numbers in gives an EMI of about 400.76 per month — a total of roughly 24,046, of which about 4,046 is interest.

What lowers your total interest

  • A shorter term — you pay more each month but far less interest overall.
  • A lower rate — even 1% makes a big difference on long loans.
  • A bigger down payment — less borrowed means less interest.
Always compare loans by their total cost, not just the monthly payment — a low EMI over a long term can cost much more.

Try it with your own numbers

Our loan calculator does the maths instantly and shows your monthly payment, total interest and total cost — in any currency.

Try the tool

Loan & EMI Calculator