Mortgage calculators
Nine tools covering every step of the home-financing decision, from "can I afford it?" to "should I refinance?"
Buying or refinancing a home is a sequence of decisions, not a single number. The right calculator depends on where you are in the process.
Before you shop, the affordability and down-payment calculators tell you what price range fits your income, debts, and savings.
When you're comparing offers, the main mortgage calculator computes monthly payment, total interest, and the full amortization schedule. If you're putting less than 20% down, the FHA loan calculator factors in MIP, and the VA loan calculator handles the funding fee for eligible service members.
After you close, the payoff calculator shows how extra principal payments save interest and shorten the loan, and the refinance calculator computes the break-even point on a rate change.
To tap home equity, the home equity loan and HELOC calculators model the two main ways to borrow against the value you've built up.
All nine use the same standard amortization math, the same formulas your lender uses internally. Results match within rounding.
See also: our 2026 study on the monthly mortgage payment for a $400K home in every US state — same loan, 50 states, PITI varies by more than $650/month (about $7,800/year) just from crossing state lines.
Before you shop
Figure out what you can afford and how much you need to put down.
- Mortgage Affordability Calculator How much house can you afford? Calculate max purchase price from income, debts, down payment, rate, and DTI ratio. See your affordable price ceiling.
- Down Payment Calculator How long to save for a home down payment? Enter price, target down payment %, monthly savings, and APR to see months to your goal and interest earned.
Comparing loan offers
Compute payments, total interest, and amortization for any loan structure.
- Mortgage Calculator Calculate monthly mortgage payment, total interest, and amortization schedule. See how extra payments save years and tens of thousands in interest.
- FHA Loan Calculator Estimate FHA loan monthly payments including upfront and annual MIP. See how the 1.75% upfront and 0.55% annual mortgage premiums change the true cost.
- VA Loan Calculator Estimate VA loan monthly payments including the VA funding fee. Configure first-use vs subsequent-use rates and see the total cost with no PMI required.
After you close
Decide on extra payments or refinancing once you have a loan.
- Mortgage Payoff Calculator See how extra monthly payments cut years off your mortgage and save tens of thousands in interest. Compare payoff with vs. without extra payments.
- Mortgage Refinance Calculator Compare your current mortgage to a refinance offer. See monthly savings, lifetime savings net of closing costs, and the break-even month.
Tapping home equity
Borrow against the value you've built up, lump-sum or line of credit.
- Home Equity Loan Calculator Calculate monthly payment and total interest on a fixed-rate home equity loan. See how a lump-sum second mortgage compares to a variable-rate HELOC.
- HELOC Calculator Calculate HELOC interest-only draw payments and the higher repayment-phase payment. See the payment shock when your variable-rate HELOC enters amortization.