Loan & EMI Calculator

How Loan Calculator works

Estimate monthly instalments, total interest and total repayment for any loan amount, rate and term. Everything happens inside this page: the tool reads your input, runs the calculation or conversion locally, and hands the result back to you. Nothing is transmitted, because there is no backend to transmit it to.

That design choice is deliberate. Most free tool sites upload your files to a server, process them there, and quietly keep a copy. Toolcin cannot do that — the site is a set of static files. If your connection dropped the moment the page finished loading, every tool would still work.

The EMI formula

The monthly payment uses the standard amortising formula: EMI = P × r × (1+r)^n ÷ ((1+r)^n − 1), where P is the principal, r the monthly rate (annual ÷ 12 ÷ 100) and n the number of months. At a zero rate the formula degenerates to P ÷ n, and the tool handles that case explicitly rather than dividing by zero.

A 1,000,000 loan at 12% over five years gives 22,244.45 per month. Total payment is 1,334,667, of which 334,667 is interest — the number that matters more than the monthly figure when comparing offers.

Why the monthly payment hides the cost

Two loans can have almost identical monthly payments and very different total costs, because the term is the lever. Stretching a loan from 5 to 10 years lowers the instalment and roughly doubles the interest paid.

The early months are almost all interest. On that same loan, the first payment covers about 10,000 of interest and only 12,244 of principal. That is why paying a little extra early saves far more than the same extra paid in year four.

What is left out

Processing fees, insurance, taxes, prepayment penalties and rate resets on a variable loan are all excluded. A nominal 12% with a 2% arrangement fee is closer to 12.5% in effective terms.

The amortisation schedule page shows the month-by-month split if you need to check a lender's own table against the arithmetic.

Good to know

• Works offline once loaded, including on flights and in locked-down networks.
• No file size limit beyond your device's own memory.
• Free to use, with no account and no usage counter.
• Results are produced locally, so they are not logged or shared with anyone.

Questions

How this number is produced

The calculation is the amortising payment formula P × r × (1+r)ⁿ ÷ ((1+r)ⁿ − 1), with r the monthly rate, following the standard reducing-balance loan formula. The formula is repeated here so the result can be checked by hand rather than taken on trust.

This is a calculator, not advice. No clinician, accountant or adviser has reviewed it, and it cannot see your circumstances. For anything involving health, a loan, a tax filing or a religious obligation, confirm the figure with a qualified professional or the authority that publishes the rule.