Loan EMI Calculator

You only need three numbers, and you can get them from a loan offer or just try your own.

1. Enter the loan amount. This is the principal, the sum you plan to borrow.
2. Enter the annual interest rate. Use the yearly percentage, such as 8.5.
3. Enter the loan term in years. Fractions work, so 2.5 years is fine.

The calculator shows your monthly EMI, the total interest payable, the total payment and the number of monthly payments.

Worked example: $20,000 at 8.5% for 5 years

The calculator uses the standard reducing-balance formula: EMI = P × r × (1+r)ⁿ ÷ ((1+r)ⁿ − 1). Here is the example step by step:

• Monthly rate: r = 8.5 ÷ 12 ÷ 100 = 0.0070833
• Number of payments: n = 5 × 12 = 60
• (1 + r)⁶⁰ ≈ 1.5273
• EMI = 20,000 × 0.0070833 × 1.5273 ÷ 0.5273 ≈ $410.33

Over 60 months you would pay about $24,620 in total, of which about $4,620 is interest. If the rate is 0%, the EMI is simply the loan amount divided by the number of months.

This is an estimate for planning. Actual loan terms, fees and eligibility come from your lender.

Your EMI is a fixed amount, but each payment covers two things: interest for the month and a slice of the original loan. The mix between them changes every month.

Interest is charged on the balance you still owe. At the start that balance is large, so most of your payment goes to interest. As the balance shrinks, the interest shrinks too, and more of the same EMI goes to principal.

The $20,000 example, month 1 vs month 60

• Month 1: interest is $20,000 × 0.0070833 ≈ $141.67, so about $268.66 of your $410.33 EMI reduces the loan.
• Month 60: the balance is only about $407, so interest is roughly $2.89 and about $407.44 goes to principal.

This is why paying a loan off early saves the most when you do it early. Extra payments made in the first years cut down the balance that interest is charged on. If you want to see how interest builds on a growing balance when you save instead, try the compound interest calculator.

Paying extra

Part-prepayments, or one extra EMI a year, go straight to principal. That lowers the balance and the interest charged on it, so you finish sooner and pay less interest overall. Check with your lender first, since some charge a prepayment fee.

Stretching a loan over more years makes each payment smaller, but you pay interest for longer. Here is $20,000 at 8.5% over three terms:

Term	Monthly EMI	Total interest	Total payment
3 years (36 payments)	$631.35	≈ $2,729	≈ $22,729
5 years (60 payments)	$410.33	≈ $4,620	≈ $24,620
7 years (84 payments)	$316.73	≈ $6,605	≈ $26,605

Going from 3 to 7 years cuts the EMI by about $315 a month, but adds roughly $3,876 in interest. Percentage differences like this are easy to check with the percentage calculator.

A sensible approach is to choose the shortest term whose EMI fits comfortably in your monthly budget. If cash flow is tight, a longer term can work, as long as you know what it costs in extra interest.

Two loans can both say "8.5%" and cost very different amounts. The difference is how the rate is applied.

• Reducing balance: interest is charged on what you still owe, which falls with every payment. This is the standard method used by banks for most loans.
• Flat rate: interest is charged on the full original amount for the whole term, even though you are repaying it month by month.

Take $20,000 for 5 years. At a flat 8.5%, interest is 20,000 × 0.085 × 5 = $8,500. The total is $28,500, or $475 a month. On a reducing-balance basis at 8.5%, the EMI is $410.33. A flat 8.5% works out to roughly 15% on a reducing-balance basis.

This calculator uses reducing balance, so you can compare offers fairly. If a lender quotes a flat rate, ask for the effective or reducing-balance rate, or compare the total amount you will repay.