Loan Calculator

Estimate principal-and-interest payments for a fixed-rate loan. Enter the amount, annual interest rate and term to see the monthly payment and total interest.

Loan details

Currency

Changing currency reinterprets the amount; no conversion is made.

Loan amount

Enter the borrowed amount, up to 1,000,000,000.

Nominal annual interest (%)

Enter 0–100%, with up to six decimal places.

Term unit

Use months for partial years. Switching units restores its own draft.

Term

Enter whole years (1–50) or months (1–600).

Estimated monthly payment

Enter an amount, annual rate and term to see an estimate.

Calculation details

The model divides the nominal annual rate by 12 and calculates equal end-of-month principal-and-interest payments.

Totals use unrounded payments, so payment times months may differ from the displayed total.

Calculation happens in your browser.

How to calculate a monthly loan payment

Choose the currency and enter the amount actually borrowed. This is the principal, which can differ from a purchase price when part of that price is paid upfront.
Enter the stated nominal annual interest rate. The calculator divides it into twelve monthly periods; an all-in APR or effective annual rate may not represent the same input.
Enter whole years or switch to whole months for a partial-year term. Review the estimated payment, total repayment and interest together, then adjust your entries to compare another scenario.

What the payment estimate means

The model spreads principal and interest over equal end-of-month payments at a fixed rate. With a positive rate, earlier payments generally contain more interest because more principal remains outstanding.

The annual percentage entered here is divided by twelve. Contracts using effective annual rates, different compounding, daily accrual or changing rates can produce different payments.

Total repayment is the unrounded theoretical monthly payment multiplied by the number of payments. Total interest is that amount minus the original principal. At zero interest, total repayment equals principal.

Displayed money follows the selected currency’s decimal places. Totals are calculated before that display rounding, so multiplying a displayed payment can give a slightly different answer. Choosing another currency changes the label and precision without converting the amount.

Loan payment examples

For EUR 10000 at 6% nominal annual interest over five years, the model estimates EUR 193.33 per month, EUR 11599.68 in total repayment and EUR 1599.68 in interest.

For EUR 10000 at 8% over ten months, the estimate is EUR 1037.03 per month. The unrounded model gives EUR 10370.32 in total repayment, rather than the EUR 10370.30 obtained by multiplying the displayed rounded payment.

For EUR 12000 at 0% over twelve months, each theoretical payment is EUR 1000 and total interest is zero. A missing rate is not treated as an interest-free loan.

What is outside this estimate?

The results include principal and modeled interest. They do not separately calculate fees, taxes, insurance, penalties or other charges, and they do not determine approval or affordability.

The model assumes a fixed rate and equal monthly periods, with no extra payments, payment holidays, interest-only phase or balloon balance. Actual contract calculations and installment rounding can differ, including the final payment.

Local calculation

The tool calculates from your entries in the browser without adding uploads, saved loan-input history or input-bearing sharing links. Other website services remain governed by the site’s privacy information.

Loan calculation questions

Enter the nominal annual interest rate that matches the monthly model. APR can include additional borrowing costs, while an effective annual rate can reflect compounding differently. Neither is automatically interchangeable with this input.

It can illustrate principal-and-interest payments when the product uses the stated fixed-rate monthly model. Enter the borrowed amount and check the contract’s calculation basis. Property costs, insurance, fees and other charges are not added separately.

Yes. Enter 0% explicitly: the principal is divided by the number of monthly payments and total modeled interest is zero. Leaving the rate blank keeps the calculation incomplete.

The displayed monthly amount is rounded to the currency’s precision. The total uses the unrounded theoretical payment. A lender can instead round each installment and adjust the last payment, so this estimate is not a cash-exact repayment schedule.

Choose Months and enter 30. Years accepts whole years, and Months accepts a whole number of payments. Switching the term unit restores its own draft rather than rounding or reinterpreting the other entry.

No exchange rate is used. The same entered number is interpreted in the selected currency and checked against its decimal precision. Confirm the currency and amount together before comparing results.

Sources and assumptions

Monthly Budget Planner

Compare average monthly income, spending and savings allocations in one unit.

Open tool — Monthly Budget Planner

Invoice Generator

Create invoices for freelance work, services or products. Add line items, tax, discounts and payment details, then print or save a PDF locally in your browser.

Open tool — Invoice Generator