Mortgage estimation
Estimate your mortgage payment before the lender meeting
The mortgage calculator turns price, down payment, rate, and term into a monthly payment instantly, entirely in your browser.
Calculate your payment in four steps
Enter the basics, read the payment, then stress-test the numbers.
Open the calculator
Open the mortgage calculator in your browser.
Enter the property price
Use the purchase price or the current value for refinancing.
Set down payment, rate, and term
Enter what you plan to pay upfront, the quoted annual rate, and the term in years.
Compare scenarios
Read the monthly payment, then test a higher rate and a shorter term to see the sensitivity.
How to estimate a mortgage payment
Different tools give different levels of detail.
Basic mortgage calculator
The mortgage calculator covers price, down payment, rate, and term, ideal for quick comparisons and rate shopping.
Best for first estimatesLoan and amortization calculator
The loan and mortgage calculator adds taxes, insurance, and extra payments for a fuller monthly picture.
Best for detailed planningSpreadsheet models
A spreadsheet gives full control and long-term schedules, but requires setup and formula knowledge.
Best for finance hobbyistsThe math the calculator uses
The payment is computed with the standard amortization formula: P = L times c(1+c)^n divided by ((1+c)^n minus 1), where L is the loan amount, c is the monthly rate, and n is the number of months. The same formula lenders use, minus the marketing.
Early payments are interest-heavy; later payments are principal-heavy. That is normal amortization. Compare total interest between terms to see the real cost of a longer loan.
Scenarios worth testing
Run at least three scenarios: your base case, a rate 0.25 percent higher, and a 15-year term. The differences tell you how much rate matters and whether a shorter term fits your budget.
Jump to tool
Run your mortgage estimate now
Open the mortgage calculator, enter your numbers, and compare scenarios before you talk to any lender.
Open Mortgage CalculatorWhy unverified payment quotes hurt
- Lender quotes vary in what they include, making direct comparison misleading
- Advertised teaser rates can differ from the rate you qualify for
- Focusing on the monthly payment hides total interest costs
- Without a baseline, fee-heavy offers look competitive
Mortgage planning practices
- Estimate before every lender meeting, not just the first
- Compare principal and interest consistently across quotes
- Ask what each quote includes: taxes, insurance, fees
- Keep your down payment and target rate assumptions documented
Frequently asked questions
What does the monthly payment include?
The basic calculation covers principal and interest. Property tax, insurance, and HOA fees are separate; the loan and mortgage calculator can add taxes and insurance for a fuller total.
How accurate is this compared to a lender quote?
For principal and interest, very accurate, because the formula is standard. Lender quotes diverge when they bundle fees, points, or escrow, so ask for the components and compare them one by one.
Should I choose a 15-year or 30-year mortgage?
A 15-year loan has a higher payment but far less total interest; a 30-year loan is cheaper monthly but costs more overall. Run both in the calculator and compare the totals, then decide with your cash-flow plan.
Is my financial data stored anywhere?
No. The calculator runs entirely in your browser. The price, down payment, and rate you enter are processed locally and never sent to a server.
Private, local mortgage math
The mortgage calculator computes everything in your browser. Your financial inputs are never uploaded, stored, or shared, so you can explore scenarios with complete privacy.
Open Mortgage Calculator