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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.

Reviewed by Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

$
$
%
years
$
$

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. 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

  1. Standard fixed-rate mortgage amortization — formula overview
    Internal editorial reference
    article