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Mortgage Calculator
Work out the monthly repayment on a mortgage from the loan amount, interest rate and term.
Mortgage payment calculator
Monthly payment: —
Total interest: —
Total repaid: —
Number of payments: —
How to use the Mortgage Calculator
- Enter the amount you are borrowing and the annual interest rate.
- Set the term in years to match your mortgage offer.
- Read the monthly payment plus the total interest and total repaid.
Features
- Monthly payment from the standard annuity formula
- Total interest and total amount repaid
- Zero-interest loans handled correctly
- Runs locally, no uploads
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Frequently Asked Questions
Common questions about the free online mortgage calculator.
The tool divides the annual rate by twelve and spreads the loan over every monthly payment
using the standard annuity formula.
It is all the interest paid across the whole term, which equals the total repaid minus the
amount you originally borrowed.
Yes. Stretching the loan over more years lowers each monthly payment but increases the total
interest you pay overall.
The tool falls back to simple division, so the monthly payment is just the loan amount spread
evenly across the months.
No. It covers principal and interest only, so add property tax, buildings insurance and any
fees on top of the figure shown.
Enter those figures and the tool reports a monthly payment of about 1228.17 with total
interest of about 168452.50.
The interest rate covers the loan itself, while the APR also folds in fees and charges, so
the APR is usually higher.
No. Every calculation happens locally in your browser and nothing you type is ever sent to a
server.
Yes. The same formula fits personal loans, student loans and any fixed-rate loan repaid in
equal monthly instalments.
Yes. It is completely free, needs no account and places no limit on how many times you
calculate.
Last updated: October 10, 2026