Down Payment Calculator (USA)
Estimate down payment amount, mortgage balance, loan-to-value ratio, and monthly principal-and-interest payment for a home purchase in the United States.
Inputs
Home price & down payment
Loan assumptions
Results
Down payment
$0
Mortgage amount
$0
Loan-to-value (LTV)
0.0%
Monthly payment (P&I)
$0
| Component | Amount | Note |
|---|
Home price split
See how the purchase price is split between down payment and mortgage amount.
Monthly payment view
Quick comparison between monthly principal-and-interest payment and upfront down payment.
How to use
- Enter the home price and choose whether you want the calculator to treat the down payment percent or the down payment amount as the main input.
- Add your expected mortgage rate and loan term.
- Click Calculate to see the upfront down payment, mortgage balance, LTV, and estimated monthly principal-and-interest payment.
If you want a full monthly payment including taxes, insurance, PMI, and HOA, use the Mortgage Payment Calculator (USA). If you want to estimate when PMI could potentially be removed, compare with the PMI Removal Date Calculator (USA).
How the calculation works
The calculator first determines the upfront down payment either from the percentage of the home price or from the dollar amount you enter, depending on the selected input mode. It then subtracts that down payment from the purchase price to estimate the mortgage amount.
Loan-to-value (LTV) is calculated by dividing the mortgage amount by the home price. The monthly payment shown is principal and interest only, estimated using the standard amortizing loan formula with your selected rate and loan term.
Example: if the home price is $400,000 and the down payment is 20%, the upfront amount is $80,000 and the mortgage amount is $320,000. With a 6.50% interest rate over 30 years, the calculator estimates the monthly principal-and-interest payment and shows the resulting LTV.
Down payment calculator (USA): estimate upfront cash, mortgage balance, and LTV
A down payment calculator helps you estimate one of the most important parts of a home purchase: how much cash you need upfront, how much you may need to borrow, and how your down payment affects the size of the mortgage. Even small changes in the down payment can change the mortgage balance meaningfully and may affect PMI, lender requirements, and monthly payment size.
This calculator estimates the down payment either as a percentage of the home price or as a fixed dollar amount, then calculates the remaining mortgage amount, loan-to-value ratio, and a basic monthly principal-and-interest payment. That makes it useful for early planning before you move into a more detailed mortgage comparison.
The monthly payment shown here does not include taxes, homeowners insurance, PMI, or HOA dues. For a fuller estimate of the complete housing payment, use the Mortgage Payment Calculator (USA). If your down payment is small enough that PMI may matter, the PMI Removal Date Calculator (USA) can help you estimate when PMI may be removed.
FAQ
Many buyers put down 10% to 20%, but some loan programs allow much smaller down payments depending on eligibility and lender rules.
Yes. A larger down payment reduces the mortgage amount, which usually lowers the monthly principal-and-interest payment and total interest over time.
No. This calculator shows principal and interest only. PMI may apply depending on your loan program and down payment size.
LTV helps measure how much you are borrowing relative to the home’s price or value. It can affect PMI, lender risk, and approval terms.