How to add one
- Pick a calculator below and click Copy embed code.
- Paste it into an HTML block on your page: Custom HTML in WordPress, a Code block in Squarespace, or an Embed element in Wix and Webflow.
- Publish. If the calculator looks cut off, raise the height value in the code.
The snippet is two lines: the calculator, and a one-line credit that links to the full guide. Please keep the credit with the calculator. It's the only thing we ask in return.
For home buyers
FHA vs. Conventional
Compare upfront cash, monthly payment, and lifetime mortgage insurance side by side. Preview the widget or read the full guide.
<iframe src="https://keystonecalculators.com/embed/fha-vs-conventional" title="FHA vs. Conventional by Keystone" width="100%" height="1100" style="border:1px solid #0a0a0b;max-width:100%" loading="lazy"></iframe> <p style="margin:6px 0 0;font:13px/1.5 system-ui,sans-serif">FHA vs. Conventional by <a href="https://keystonecalculators.com/calculators/fha-vs-conventional">Keystone</a></p>
Free to use with the credit link intact.
Mortgage Calculator
Monthly payment with taxes, insurance, PMI, and HOA, a full amortization schedule, and what extra payments save. Preview the widget or read the full guide.
<iframe src="https://keystonecalculators.com/embed/mortgage-calculator" title="Mortgage Calculator by Keystone" width="100%" height="1100" style="border:1px solid #0a0a0b;max-width:100%" loading="lazy"></iframe> <p style="margin:6px 0 0;font:13px/1.5 system-ui,sans-serif">Mortgage Calculator by <a href="https://keystonecalculators.com/calculators/mortgage-calculator">Keystone</a></p>
Free to use with the credit link intact.
Home Affordability Calculator
The highest price a lender's 28/36 debt-to-income rules allow, the payment it brings, and what moves it. Preview the widget or read the full guide.
<iframe src="https://keystonecalculators.com/embed/home-affordability-calculator" title="Home Affordability Calculator by Keystone" width="100%" height="1100" style="border:1px solid #0a0a0b;max-width:100%" loading="lazy"></iframe> <p style="margin:6px 0 0;font:13px/1.5 system-ui,sans-serif">Home Affordability Calculator by <a href="https://keystonecalculators.com/calculators/home-affordability-calculator">Keystone</a></p>
Free to use with the credit link intact.
Rent vs. Buy Calculator
Net worth if you buy against renting and investing the difference, year by year, with the breakeven year. Preview the widget or read the full guide.
<iframe src="https://keystonecalculators.com/embed/rent-vs-buy-calculator" title="Rent vs. Buy Calculator by Keystone" width="100%" height="1100" style="border:1px solid #0a0a0b;max-width:100%" loading="lazy"></iframe> <p style="margin:6px 0 0;font:13px/1.5 system-ui,sans-serif">Rent vs. Buy Calculator by <a href="https://keystonecalculators.com/calculators/rent-vs-buy-calculator">Keystone</a></p>
Free to use with the credit link intact.
Refinance Calculator
New payment, break-even month, and how far ahead you are when you move, counting the balance left on each loan. Preview the widget or read the full guide.
<iframe src="https://keystonecalculators.com/embed/refinance-calculator" title="Refinance Calculator by Keystone" width="100%" height="1100" style="border:1px solid #0a0a0b;max-width:100%" loading="lazy"></iframe> <p style="margin:6px 0 0;font:13px/1.5 system-ui,sans-serif">Refinance Calculator by <a href="https://keystonecalculators.com/calculators/refinance-calculator">Keystone</a></p>
Free to use with the credit link intact.
Closing Cost Calculator
Lender fees, title, taxes, and prepaid escrow, line by line, and the cash to close they add up to. Preview the widget or read the full guide.
<iframe src="https://keystonecalculators.com/embed/closing-cost-calculator" title="Closing Cost Calculator by Keystone" width="100%" height="1100" style="border:1px solid #0a0a0b;max-width:100%" loading="lazy"></iframe> <p style="margin:6px 0 0;font:13px/1.5 system-ui,sans-serif">Closing Cost Calculator by <a href="https://keystonecalculators.com/calculators/closing-cost-calculator">Keystone</a></p>
Free to use with the credit link intact.
HELOC Calculator
Credit line at your lender's loan-to-value limit, the interest-only payment, and the jump when repayment starts. Preview the widget or read the full guide.
<iframe src="https://keystonecalculators.com/embed/heloc-calculator" title="HELOC Calculator by Keystone" width="100%" height="1100" style="border:1px solid #0a0a0b;max-width:100%" loading="lazy"></iframe> <p style="margin:6px 0 0;font:13px/1.5 system-ui,sans-serif">HELOC Calculator by <a href="https://keystonecalculators.com/calculators/heloc-calculator">Keystone</a></p>
Free to use with the credit link intact.
For investors
BRRRR Calculator
Model buy, rehab, rent, refinance, repeat. See cash left in the deal, cash-on-cash return, and 10-year equity. Preview the widget or read the full guide.
<iframe src="https://keystonecalculators.com/embed/brrrr-calculator" title="BRRRR Calculator by Keystone" width="100%" height="1100" style="border:1px solid #0a0a0b;max-width:100%" loading="lazy"></iframe> <p style="margin:6px 0 0;font:13px/1.5 system-ui,sans-serif">BRRRR Calculator by <a href="https://keystonecalculators.com/calculators/brrrr-calculator">Keystone</a></p>
Free to use with the credit link intact.
MAO Flip Estimator
Find your maximum allowable offer from ARV, repairs, holding costs, and target profit. Preview the widget or read the full guide.
<iframe src="https://keystonecalculators.com/embed/mao-flip-estimator" title="MAO Flip Estimator by Keystone" width="100%" height="1100" style="border:1px solid #0a0a0b;max-width:100%" loading="lazy"></iframe> <p style="margin:6px 0 0;font:13px/1.5 system-ui,sans-serif">MAO Flip Estimator by <a href="https://keystonecalculators.com/calculators/mao-flip-estimator">Keystone</a></p>
Free to use with the credit link intact.
Rental Property Depreciation
Estimate annual depreciation on residential rentals using the 27.5-year MACRS schedule. Preview the widget or read the full guide.
<iframe src="https://keystonecalculators.com/embed/rental-depreciation" title="Rental Property Depreciation by Keystone" width="100%" height="1100" style="border:1px solid #0a0a0b;max-width:100%" loading="lazy"></iframe> <p style="margin:6px 0 0;font:13px/1.5 system-ui,sans-serif">Rental Property Depreciation by <a href="https://keystonecalculators.com/calculators/rental-depreciation">Keystone</a></p>
Free to use with the credit link intact.
DSCR Loan Calculator
Debt service coverage ratio on a rental, the rent each lender tier needs, and the largest loan the rent supports. Preview the widget or read the full guide.
<iframe src="https://keystonecalculators.com/embed/dscr-calculator" title="DSCR Loan Calculator by Keystone" width="100%" height="1100" style="border:1px solid #0a0a0b;max-width:100%" loading="lazy"></iframe> <p style="margin:6px 0 0;font:13px/1.5 system-ui,sans-serif">DSCR Loan Calculator by <a href="https://keystonecalculators.com/calculators/dscr-calculator">Keystone</a></p>
Free to use with the credit link intact.
Cap Rate & Rental ROI Calculator
NOI, cap rate, cash-on-cash, total return, GRM, and the 1% rule from one set of numbers. Preview the widget or read the full guide.
<iframe src="https://keystonecalculators.com/embed/cap-rate-calculator" title="Cap Rate & Rental ROI Calculator by Keystone" width="100%" height="1100" style="border:1px solid #0a0a0b;max-width:100%" loading="lazy"></iframe> <p style="margin:6px 0 0;font:13px/1.5 system-ui,sans-serif">Cap Rate & Rental ROI Calculator by <a href="https://keystonecalculators.com/calculators/cap-rate-calculator">Keystone</a></p>
Free to use with the credit link intact.
Terms
- The widgets are free for any website, commercial or not.
- Keep the credit line under the calculator, and don't alter the calculator itself.
- We update the calculators when loan rules or data change, and every embed gets the update automatically.
- The calculators give educational estimates, not financial advice. See the disclaimer.
Want a calculator we don't have, or need help adding one? Contact us.