About the Loan Calculator

The Loan Calculator computes the monthly payment, total payment, and total interest for a fixed-rate loan using the standard amortisation formula M = P × [r(1+r)ⁿ] / [(1+r)ⁿ − 1], where P is the principal, r is the monthly rate, and n is the number of monthly payments.

The amortisation formula produces the fixed monthly payment that retires the loan balance exactly over the term. Each payment is split between interest — charged on the outstanding balance — and principal. Early in the loan the balance is large, so most of each payment is interest and the balance declines slowly; later, the split reverses and the balance drops faster. This is why total interest is sensitive to both the rate and the term: a longer term lowers the monthly payment but extends the period over which interest accrues on a large balance, often increasing total interest dramatically. A shorter term raises the payment but retires the balance faster, cutting total interest. The calculator shows all three figures — monthly payment, total paid, and total interest — so you can see the full cost of borrowing, not just the monthly figure.

This calculator runs entirely in your browser — your inputs are not stored or transmitted. Results are estimates for general information only and are not financial advice. Confirm figures with your lender or a licensed advisor before deciding.

How to use the Loan Calculator

1. 1Enter the loan amount, annual interest rate, and term in months.
2. 2Read the monthly payment, total payment, and total interest.

How the Loan Calculator works

For the Loan Calculator specifically, it computes the monthly payment, total payment, and total interest for a fixed-rate loan using the standard amortisation formula M = P × [r(1+r)ⁿ] / [(1+r)ⁿ − 1], where P is the principal, r is the monthly rate, and n is the number of monthly payments. Finance calculators apply standard time-value-of-money and amortization formulas, and every calculation runs locally in the browser — your inputs are not stored or transmitted. Loan, mortgage, EMI, and credit-card calculators use the amortization formula M = P × [r(1+r)ⁿ] / [(1+r)ⁿ − 1], where P is principal, r is the monthly interest rate, and n is the number of payments — the fixed payment that retires the balance exactly over the term. Each payment splits between interest (charged on the outstanding balance) and principal, so early payments are mostly interest and the balance declines slowly at first. Compound interest uses A = P(1 + r/n)^(nt), where n is the compounding frequency; more frequent compounding earns slightly more. Investment and savings calculators combine a lump-sum future value with the future value of an annuity (monthly contributions), so contributions made early compound longer. ROI divides net gain by cost; annualized ROI compounds it over the holding period to make different durations comparable. NPV discounts each future cash flow by (1+r)^t and subtracts the initial investment; IRR solves iteratively for the discount rate that makes NPV zero. Results are estimates that exclude fees, taxes, insurance, and dividends, and assume fixed rates and level payments, so confirm figures with your lender or a licensed advisor before deciding. Currency rates are approximate reference values, not live rates, and are unsuitable for transactions.

How this tool handles your data. This calculator runs entirely in your browser. The figures you enter are not stored or transmitted. Results are estimates for general information only and are not financial advice; confirm figures with your lender or a licensed advisor before deciding. Currency rates are approximate reference values, not live rates.

Supported formats & limitations. Calculators use standard amortisation, compound-interest, and time-value-of-money formulas. Loan and mortgage calculators assume a fixed rate, level payments, and no fees, taxes, or insurance. Currency rates are approximate reference values. Results are estimates for educational purposes and are not financial advice.

Practical workflow. In practice, you work through a short sequence: 1. Enter the loan amount, annual interest rate, and term in months 2. Read the monthly payment, total payment, and total interest. It is well suited to comparing personal loan offers; estimating monthly payments before borrowing; seeing total interest over a loan term.

Best practice. Compare scenarios side by side — run the same calculator with a higher down payment or shorter term — and treat every result as an estimate to confirm with a qualified advisor.

Tips & common pitfalls. With the Loan Calculator in particular, comparing personal loan offers. Compare scenarios side by side — run the same calculator with a higher down payment or shorter term — and treat every result as an estimate to confirm with a qualified advisor. The calculators exclude fees, taxes, insurance, and dividends, and assume fixed rates and level payments, so real loans and investments will differ. Currency rates are approximate reference values, not live rates, and are unsuitable for transactions. For debt payoff, confirm that your monthly payment covers the interest, otherwise the balance never declines.

Troubleshooting

The first thing to know about the Loan Calculator: it assumes a fixed rate, level monthly payments, and no fees, taxes, or insurance. If a result looks implausible, re-check that you entered the rate as an annual percentage and the term in the right unit (months vs years) — a unit mismatch is the most common error. If a debt payoff shows no result, your monthly payment does not cover the interest; raise the payment above the monthly interest charge. If the mortgage payment seems low, remember it excludes property tax, insurance, PMI, and HOA dues — add those for your full housing cost. If currency results seem off, the rates are approximate references, not live; confirm with a live source before any transaction. All figures are estimates that exclude fees, taxes, and insurance, so confirm with your lender or a licensed advisor before deciding.

Common use cases

• Comparing personal loan offers.
• Estimating monthly payments before borrowing.
• Seeing total interest over a loan term.

Frequently asked questions

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