Rent Calculator – Calculate Monthly or Prorated Rent
Find out how much rent you can afford and how it compares to the 30% guideline.
About the Rent Calculator
What is the Rent Calculator?
A rent calculator shows what share of your income a given rent consumes and whether it fits the widely used 30% guideline.
Why use this calculator?
Rent is usually the largest line in a budget. Keeping it within a sensible share of income leaves room for savings and emergencies.
How to use it
- Enter your gross annual income.
- Enter the rent you are considering.
- Add your other monthly debt payments.
- See whether the rent is comfortable, stretched or risky.
Formula
Rent ratio = monthly rent ÷ gross monthly income
In expensive cities people often spend more than 30%. Adjust the guideline to your own budget and priorities.
Frequently Asked Questions
Is the 30% rule based on gross or net income?
It uses gross (pre-tax) income. If you prefer to budget from net pay, aim for about 40% of your take-home pay.
What costs beyond rent should I expect?
Utilities, renters insurance, parking, and possibly a security deposit and application fees. Ask the landlord exactly what is included.
Can I print or share my result?
Yes. Use your browser's print function or screenshot the result. The page is designed to print cleanly.
What if my inputs are outside the typical range?
The calculators accept a wide range of values, but extreme inputs may produce unrealistic results. Double-check the units you are using.
How often is the calculator updated?
We review formulas and rates periodically to keep them aligned with current standards and published data.
Is this calculator free to use?
Yes. Every calculator on this site is completely free, with no hidden fees, no subscriptions and no limits on how many times you can use it.
How accurate are the results?
We use standard, widely accepted formulas and calculate in your browser using double-precision arithmetic. Results are rounded for readability, so treat them as reliable estimates rather than a guarantee. Real-world factors can vary the true figure.
Can I add this calculator to my own website?
Yes. Open this calculator page and use the "Add to your website" box in the sidebar to copy a ready-made iframe snippet, then paste it into any HTML page.
Does it work on a phone or tablet?
Yes. The layout is fully responsive, so it works on desktops, laptops, tablets and mobile phones, and every input adapts to touch screens.
Is the information I type kept private?
Yes. All calculations run locally in your browser. Nothing you enter is uploaded, stored or shared with anyone.