EMI Calculator explained with worked examples

A formula is easier to trust once you have seen it work on real numbers. This guide runs the same EMI formula through three different loans, so you can see how the amount, the rate and the tenure each push the monthly payment around. All three use the standard reducing-balance formula, where interest is charged on what you still owe, not on the original loan.

A small personal loan

Borrow ₹2,00,000 at 12% a year for 5 years. The EMI is ₹4,449 a month, the total payment is ₹2,66,933 and the interest is ₹66,933. The rate looks high, but the short tenure keeps the total interest modest — about a third of the amount borrowed.

A mid-size loan

Borrow ₹5,00,000 at 9% a year for 15 years. The EMI is ₹5,071, the total payment is ₹9,12,840 and the interest is ₹4,12,840. Stretch the same loan to 20 years and the EMI falls, but the interest climbs well past the amount borrowed — the classic long-tenure trap.

A home loan

Borrow ₹20,00,000 at 8.5% a year for 20 years. The EMI is ₹17,356, the total payment is ₹41,65,552 and the interest is ₹21,65,552 — more than the loan itself. That is normal for a 20-year loan, and it is exactly why comparing tenures matters more than comparing EMIs.

Frequently asked questions

Why is the interest sometimes larger than the loan?

Because interest is charged every month for years. On a 20-year loan you pay interest 240 times, and those payments add up past the original amount.

Does a lower rate always beat a shorter tenure?

Not always. A slightly higher rate over a much shorter tenure can cost less in total than a low rate stretched over 30 years. Compare total interest, not just the rate.

Can I check these numbers by hand?

Yes for the 0% case, where the EMI is just the amount divided by months. For any other rate you need the full formula, which is why the calculator exists.