Calculate monthly mortgage payments and home affordability
What is the Mortgage Calculator?
The mortgage works like this: it extends loan math with property tax, insurance, HOA and PMI so the monthly payment reflects the true cost of owning, not just the note. Everything happens on your device - the input never leaves your tab unless the tool clearly states it performs a server-side lookup.
How to use the Mortgage Calculator
Enter the values the calculator asks for.
Double-check the unit or period next to each field (per month vs per year, cm vs m).
Read the result together with the breakdown shown beneath it.
Adjust one input at a time to compare scenarios side by side.
Features
Calculate monthly mortgage payments and home affordability
Instant result, no page reload
Works in any modern browser, desktop or mobile
Free with no signup
Common mistakes to avoid
Mixing units or periods between fields
Rounding inputs before the final calculation
Treating estimates as guarantees for major decisions
Examples
Input
Result
Loan 40M at 9% for 25y + 1% tax + 0.5% insurance
Principal & interest 335,768 · total monthly with escrow ~384,000
Best used for
Getting a reliable answer for mortgage without installing an app
One-off tasks done in under a minute from any device
Checking results before committing them to something important
Working on a phone where desktop software is unavailable
Privacy
Calculations run in your browser. Enter only what the calculation needs.
Frequently asked questions
How much do taxes and insurance add?
Commonly 20-40% on top of principal and interest, depending on jurisdiction. Escrowed costs are why "affordable" notes often feel tight.
Should I use a shorter term?
A 15-year term roughly doubles the payment but cuts total interest dramatically - often by more than half.
What is the difference between the payment and the escrow total?
The base payment is principal plus interest; the escrow total adds property tax, insurance, HOA and PMI so the number matches what actually leaves your account monthly.
When does PMI drop off?
Conventionally once you reach 20% equity - enter PMI as zero from that date onward and the schedule shows the payment step down.