Calculateur de Home Affordability
Estimate an affordable home purchase price using the 28% front-end ratio guideline.
Formula and method
This calculator computes Max monthly payment (28% rule), Approx. affordable loan amount directly in your browser without sending data to an external server.
Mathematical formula
- Max monthly payment (28% rule):
grossMonthlyIncome × 0.28 - Approx. affordable loan amount:
(() => { const pay=grossMonthlyIncome × 0.28; const r=rate ÷ 1200; const n=years × 12; return r===0 ? pay × n : pay × (1-1+r^(-n)) ÷ r; })()
Variables and parameters
- Gross monthly income (grossMonthlyIncome): default value 6000.
- Mortgage interest rate (rate): default value 6.5 %.
- Loan term (years): default value 30 years.
Some formulas are undefined for certain input combinations (such as division by zero or logarithms of non-positive numbers). In those cases the live tool displays an alert instead of NaN.
Embed this tool
Paste this snippet into your own site or blog post to embed a live, working copy of this tool. It links back to the full page on SpecWhale.
Frequently asked questions
What equation and variables does Home Affordability Calculator use?
Home Affordability Calculator evaluates outputs such as <strong>Max monthly payment (28% rule), Approx. affordable loan amount</strong> based on inputs including Gross monthly income, Mortgage interest rate, Loan term. Check the Mathematical Method section for the explicit formula.
How can I compare different financial scenarios using Home Affordability Calculator?
You can click the "Add to Compare" button after computing your scenario to pin it to your temporary side-by-side Compare Workbench, allowing you to evaluate loan, rate, or interest differences.
What happens if I enter invalid or zero values into Home Affordability Calculator?
If an input combination is mathematically undefined (such as division by zero or negative square roots), SpecWhale alerts you gracefully rather than returning invalid NaN outputs.
Are my calculations in Home Affordability Calculator saved or private?
All calculations are 100% private and run locally in your Web browser. Your numbers are never uploaded to any server, but can be saved locally to your device or exported as CSV/JSON.
Is Home Affordability Calculator free to use?
Yes. Home Affordability Calculator is completely free, has no usage limit, and does not require an account, email, or API key.
Does Home Affordability Calculator store or upload my data?
No. Home Affordability Calculator calculates everything locally in your browser. Nothing you type is sent to a server or stored by SpecWhale.
How accurate is Home Affordability Calculator?
Home Affordability Calculator uses a standard formula (see the Method section above for the exact expression). For high-stakes financial, medical, or legal decisions, confirm the result with a professional or an authoritative source before relying on it.
Can I embed Home Affordability Calculator on my own website?
Yes. Use the "Embed this tool" snippet on this page to add a free, working copy of Home Affordability Calculator to your own blog post or page.