Mortgage Calculator
Monthly payment, total interest, and a full amortization schedule.
Estimate monthly mortgage payments, total interest, and the amortization schedule from home price, down payment, rate, and term.
How to use this calculator
- Fill in the inputs above using the units you already have.
- Values update automatically as you type — no submit button needed.
- Hover any result row for the underlying formula and intermediate values.
Formula
M = P · r(1 + r)n / ((1 + r)n − 1)
Where P is the loan principal, r the monthly interest rate, and n the total number of payments.
In depth
Estimate monthly mortgage payments, total interest, and the amortization schedule from home price, down payment, rate, and term.
Frequently asked questions
Yes — if the down payment is below 20% of the home price, a default PMI assumption is added. You can adjust it in the advanced inputs.
The schedule uses the same fixed-rate formula banks use for standard amortizing mortgages, so it should match typical lender statements very closely.
Sources & references
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Standard fixed-rate mortgage amortization — formula overviewarticleInternal editorial reference
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