EMI Calculator — Home, Car & Personal Loan (2026)

What an EMI is

One fixed monthly payment covering both interest and principal. The amount never changes; what changes is its composition — early payments are mostly interest, later ones mostly principal. So the payment is predictable while the progress it makes is not even.

The formula

EMI = P x r x (1+r)^n / ((1+r)^n - 1)

• P — the principal
• r — the monthly rate: the annual rate divided by 12 and by 100
• n — the number of months

That monthly conversion is where hand calculations usually go wrong. Putting the annual rate straight into the formula gives an answer that is wildly too high, and it is a mistake that looks like arithmetic rather than a misreading.

The trade nobody shows you both halves of

Take 500,000 at 8.5%:

• Over 10 years — EMI 6,199.28, total interest 243,914.13
• Over 20 years — EMI 4,339.12, total interest 541,387.88

The monthly payment falls by nearly 1,900, which is a real and sometimes decisive difference to a household budget. The total interest rises to 2.22 times what it was.

Note that doubling the term does not double the interest — it more than doubles it. Interest is charged on the outstanding balance, and a longer term means the balance stays large for far longer, so you are paying interest on a big number for twice as many months. A lower EMI is not a cheaper loan. It is a longer one.

Neither figure is the right one on its own. The EMI tells you whether you can pay it; the total tells you what it costs. Deciding on one while ignoring the other is how people end up surprised.

Why you hear the EMI first

Because it is the number that determines whether an application is approved — the lender is checking it against your income. It is also, conveniently, the flattering one, and the total interest generally lives further into the paperwork.

That is not a conspiracy, just an incentive worth knowing about. Ask for the total, and compare offers on total cost including fees rather than on the headline rate.

Why prepaying early does more

Since early payments are mostly interest, the balance falls slowly at the start. A lump sum paid against the principal in year two removes interest that would have accrued on that amount for the whole remaining term; the same sum in year nine removes far less.

That is arithmetic rather than advice — whether prepaying is right for you depends on your alternatives and on whether your loan carries a prepayment charge.

What the calculation assumes

• A fixed rate for the whole term
• No fees — no processing, documentation or insurance loaded into the loan
• No prepayment or early closure

A floating-rate loan will not follow this schedule, since both the rate and the instalment can move. And because fees are excluded, the honest comparison between two lenders is the total cost including everything they charge — a lower rate with a large processing fee is frequently the dearer loan.

Everything runs in your browser and nothing you type is uploaded. For a property loan, where tax and insurance also have to be budgeted alongside the instalment, use the mortgage calculator.