Rex says
The number that matters isn't the price — it's the monthly. Most surprises come from rate, not principal. Move the rate slider 1% and watch the monthly jump; that's the conversation to have with your lender.
Try a scenario
Click to load — tweak from there.Inputs
Result
Monthly payment
$2,075.51
Loan amount
$320,000
Total interest
$427,185
Total paid
$747,185
About $2,076/mo (principal + interest only). Over 30 years you'll pay ~$427,185 in interest — that's 133% on top of the loan. Add ~1–2% of home value/year for taxes + insurance.
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How to use this
- 1Enter the home price you're considering.
- 2Down payment goes here — 20% avoids PMI in most cases.
- 3Punch in the rate your lender quoted (or today's average for a gut-check).
- 4Pick your term — 30-year keeps it low, 15-year cuts interest in half.
- 5Add ~1–2% of home value/year for taxes + insurance — those aren't included here.
About this calculator
Estimate the monthly payment on a home loan from price, down payment, interest rate, and term. Includes total interest paid over the life of the loan.
Worked example
Using the values the calculator loads with:
Inputs
- Home price: 400000 $
- Down payment: 80000 $
- Interest rate: 6.75 %
- Loan term: 30 years
Results
- Monthly payment: $2,075.51
- Loan amount: $320,000.00
- Total interest: $427,185.01
- Total paid: $747,185.01
What each field means
Inputs
- Home price ($)
- The home price used in the calculation, measured in $. Starts at 400000 $ so you have a working example on load.
- Down payment ($)
- The down payment used in the calculation, measured in $. Starts at 80000 $ so you have a working example on load.
- Interest rate (%)
- The interest rate used in the calculation, measured in %. Starts at 6.75 % so you have a working example on load.
- Loan term (years)
- The loan term used in the calculation, measured in years. Starts at 30 years so you have a working example on load. Accepted range: 1–50 years.
Results
- Monthly payment
- Returned as a money amount in US dollars and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Loan amount
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Total interest
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Total paid
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
Does this include taxes and insurance?
No — this is principal and interest only. Add 1–2% of home value annually for taxes + insurance estimates.
Accuracy and limitations
- Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
- Rates are treated as fixed for the whole period — variable-rate products will drift from this projection.
- This is educational maths, not financial advice. Check anything contractual with the lender or your accountant.
Related tools
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Mortgage Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/mortgage
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/mortgage" target="_blank" rel="noopener">Mortgage Calculator — RevenueLab</a> (2026).</p>
Source: [Mortgage Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/mortgage) (2026).