Mortgage Calculator
Enter values to calculate mortgage with a clear result.
Calculate
Enter values and select Calculate.
For information only, not professional advice.
How it works
Principal = home price − down payment. Monthly payment = principal × monthly interest rate ÷ (1 − (1 + monthly interest rate) raised to minus payment count). At zero interest, divide principal by payment count.
Worked examples
- Home 120,000, down 20,000, 0%, 10 years: 833.33 per month
- Home 120,000, down 20,000, 12%, 1 year: 8,884.88 per month
Frequently asked questions
Is this calculator free?
Yes. You can use it without paying or creating an account.
Does it work on a phone?
Yes. The page adapts to small and large screens.
Can I enter zero?
Where zero is mathematically valid, the calculator accepts it.
What happens if I enter an invalid value?
You will see a clear message explaining what to correct.
Does the calculation run in my browser?
Yes. The calculator runs with JavaScript on your device.
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Last updated: October 17, 2026