Down Payment Calculator

Calculate a home down payment as a percent or dollar amount, the resulting loan amount, and whether PMI is likely to apply.

⏱ Updated: 17 Sep 2026

Calculator

Free down payment calculator: find the down payment amount, percentage, and resulting loan amount on a home purchase.

Down Payment
Down Payment %
Loan Amount
Under 20% down, a conventional loan typically requires private mortgage insurance (PMI) until you build enough equity. This tool doesn't calculate the PMI cost itself.

Enter a home price and a down payment percent or dollar amount to see the loan amount and whether PMI is likely to apply.

How to Use the Down Payment Calculator

Enter a home price, then choose whether you'd rather specify the down payment as a Percent or a Dollar Amount — whichever mode is active drives the other field automatically, so typing 15% fills in the dollar figure and vice versa.

Loan amount falls straight out of the subtraction: home price minus down payment. The percentage matters for more than arithmetic, though — it's the number lenders actually check against a familiar threshold.

Loan Amount = Home Price − Down Payment
Down Payment % = Down Payment ÷ Home Price × 100

Drop below 20% down on a conventional loan and private mortgage insurance (PMI) typically gets added to the deal — an extra monthly cost that protects the lender, not you, until enough equity builds up through payments and appreciation. This calculator flags when that threshold is crossed but doesn't compute the PMI premium itself; that's a cost that depends on the loan program and insurer, which is what the site's FHA and conventional mortgage calculators are for.