Loan Calculator
Work out repayments and total interest on any fixed-rate personal loan.
How this calculator works
A general purpose repayment tool for car finance, personal loans, refurbishment credit or anything else with a fixed rate and fixed term. You get the periodic payment, the total interest cost and the full amount repaid.
The Loan Calculator is a general-purpose repayment tool for any fixed-rate, fixed-term borrowing — car finance, a personal loan, refurbishment credit, or a consolidation loan. Enter the amount you are borrowing, the annual interest rate, and how long you have to repay, and it returns the regular payment, the total interest cost, and the full amount you will have repaid by the end.
Comparing loans is really about comparing two things: the monthly affordability and the total cost. A longer term spreads the pain but increases the interest, while a lower rate can outweigh a slightly longer term. Because the calculator shows both the periodic payment and the total interest, you can weigh those trade-offs directly rather than guessing from a headline rate.
Bear in mind that advertised rates often assume certain loan sizes or credit profiles, and many real loans include arrangement fees or early-settlement charges that this tool does not model. Treat the results as a solid estimate for comparing like-for-like offers, and check the lender's full breakdown before signing.
Everything runs in your browser as you type — nothing is stored or sent to a server. Results are estimates for general guidance and should not replace advice from a qualified professional.
Frequently asked questions
What can I use the Loan Calculator for?
Any fixed-rate, fixed-term borrowing: car finance, personal loans, home improvement credit, or consolidation loans. It is not designed for credit cards or overdrafts where the balance and rate change over time.
How is total interest worked out?
Total interest is the full amount repaid (the periodic payment multiplied by the number of payments) minus the original loan principal.
Does it include loan fees?
No. Arrangement fees, late-payment charges and early-settlement fees vary by lender and are not modelled. The figures are estimates for comparing like-for-like offers.
Related calculators
- US Mortgage Calculator — Estimate the monthly repayment on a US home loan from the amount, rate and term, and see how an extra monthly payment shortens it.
- Compound Interest Calculator — See how savings grow when interest earns interest, with optional monthly deposits.
- Salary Calculator — Convert an annual salary into hourly, weekly and monthly pay, before and after US tax.
- All money & finance tools
Browse all CalculatorWonder calculators or read the guides behind the numbers.