Free contract calculators

Quick, free tools for the numbers inside contracts: how much rent you owe for a partial month, whether a deposit is over your state's limit, and when it's due back. No sign-up, and nothing you type leaves your browser.

How we build these

Every calculator shows its formula, and any legal limit it uses links to the official state or federal source, with the date we last checked it. They give estimates, not legal advice. Your lease and local rules can change the answer.

Coming next

Lease break cost, late rent fees, 1099 self-employment tax, contractor rate to salary, and auto-renewal notice deadlines.

Frequently asked questions

Are these calculators free?

Yes. There's no sign-up, and everything runs in your browser.

Where do the legal limits come from?

From each state's official code or the relevant federal rule, linked next to every result with the date we checked it.

Can I rely on the result?

Use it as a well-sourced estimate. Leases, city rules and exceptions can change the answer, and the result is not legal advice.

Looking for the guides instead? See all contract guides.

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