About RentCalc
Rental calculators that show the dates, formulas and assumptions behind the result.
What you can calculate
RentCalc covers partial-period charges, concessions, rent changes, income ratios and property comparisons. Editable letters help organize a notice or deposit accounting.
Each tool shows its assumptions. The methodology documents the formulas, rounding and input limits. Examples are hypothetical; dated legal guides cite their sources.
Using an estimate
Confirm the billable period and applicable lease terms before relying on a result. A calculator cannot establish legal entitlement, validate a notice or approve a rental application.
Calculations run in your browser without an account. See privacy for how inputs, page requests and email are handled. Report an issue through contact with a reproducible example.