How to calculate EMI
EMI is the fixed amount you pay every month on a loan until it is cleared. The number looks mysterious, but it comes from a single formula that balances the loan amount, the interest rate and how long you take to repay. Once you see how those three inputs pull on the payment, choosing a loan becomes much easier.
EMI stands for Equated Monthly Installment — the same amount paid each month across the life of a loan. Early payments are mostly interest and later ones mostly principal, but the total you pay stays constant. The fastest way to get the figure is the EMI calculator; this guide explains what it is doing.
The EMI formula
The standard formula is:
$$EMI = \frac{P \cdot r \cdot (1 + r)^n}{(1 + r)^n - 1}$$
where P is the principal (the amount borrowed), r is the monthly interest rate (the annual rate divided by 12, expressed as a decimal), and n is the number of monthly payments (the tenure in months). The EMI calculator applies this for you so you never have to compute the powers by hand.
A worked example
Suppose you borrow 500,000 at 12% per year over 5 years. The monthly rate is 12% ÷ 12 = 1% (r = 0.01), and the tenure is 5 × 12 = 60 months (n = 60). Feeding those into the formula gives an EMI of roughly 11,122 per month. Over 60 months you pay about 667,000 in total, of which around 167,000 is interest — a detail the loan calculator makes explicit.
What each input does
- Principal. The EMI scales directly with the amount — borrow twice as much and, all else equal, the EMI doubles.
- Interest rate. A higher rate raises the EMI and, more importantly, the total interest paid over the term.
- Tenure. A longer tenure lowers the monthly EMI but increases the total interest, because you are borrowing for longer. A shorter tenure does the reverse.
EMI versus total cost
A low EMI can be tempting, but stretching the tenure to shrink the monthly payment means paying more interest overall. Always look at the EMI alongside the total repayment. Use the EMI calculator for the monthly figure and the loan calculator for the total interest and cost, then compare offers on both numbers.
Frequently asked questions
Does a longer loan term reduce what I pay?
It reduces the monthly EMI but increases the total interest, so you pay more in the end. A shorter term costs more each month but less overall.
Why is early-EMI mostly interest?
Interest is charged on the outstanding balance, which is highest at the start. As the balance falls, the interest portion of each fixed EMI shrinks and the principal portion grows.
Is the rate I enter monthly or yearly?
Loan rates are usually quoted per year. The formula uses the monthly rate, so the annual rate is divided by 12 — the EMI calculator handles that conversion for you.
Work out your EMI
Enter your amount, rate and tenure in the EMI calculator to see the monthly payment instantly, then open the loan calculator to see the full cost. More money tools are listed in our guide to online calculators.
