Free Tools
Rent & Rental Property Calculators
The numbers renters and landlords actually have to run — worked out instantly, with the formula shown so you can check it. Free, no sign-up, no email gate.
These are calculation aids for planning and education, not tax, legal, or investment advice. Rules vary by state and situation — confirm anything consequential with a qualified professional.
For landlords & investors
Sizing up a purchase, pricing a renewal, and getting the tax and deposit numbers right.
Cap Rate Calculator
Capitalization rate from purchase price and net operating income — the standard yardstick for comparing rentals.
Open calculatorCash-on-Cash Return Calculator
Annual pre-tax cash flow against the actual cash you put in, including the mortgage.
Open calculatorNOI Calculator
Net operating income from rent, vacancy, and operating expenses — before any mortgage.
Open calculatorProrated Rent Calculator
Partial-month rent for any move-in or move-out date, using all three standard methods.
Open calculatorRent Increase Calculator
New rent from a percentage or dollar increase, with the annual impact and a rent-cap check.
Open calculatorRent vs. Sell Calculator
Compare keeping a property as a rental against selling it and investing the proceeds.
Open calculatorRental Property Depreciation Calculator
Annual straight-line depreciation over 27.5 years, split from non-depreciable land.
Open calculatorSecurity Deposit Interest Calculator
Interest owed on a held security deposit, for the states that require it.
Open calculatorFor renters
Working out what you can afford, splitting it fairly, and budgeting the move.
Moving Cost Calculator
Estimate a local or long-distance move across movers, container, and DIY.
Open calculatorRent Affordability Calculator
How much rent you can afford on the 30% rule, adjusted for debts and the 40x landlord test.
Open calculatorRent Per Square Foot Calculator
Compare up to three units head to head on cost per square foot.
Open calculatorRent Split Calculator
Split rent between roommates evenly, by room size, or by income — with perk adjustments.
Open calculatorRent vs. Buy Calculator
Your break-even year, including closing costs and the opportunity cost of a down payment.
Open calculatorRenters Insurance Calculator
Size personal property coverage by adding up what you own, category by category.
Open calculatorWhich Calculator Do You Need?
Deciding whether to buy: start with the NOI calculator to get the property's income after expenses, then the cap rate calculator to compare it against other properties, and the cash-on-cash return calculator to see what it returns on the cash you actually put down.
Already own it: the rent increase calculator for renewals, the prorated rent calculator for mid-month move-ins and move-outs, the security deposit interest calculator if your state requires interest on held deposits, and the depreciation calculator at tax time.
Renting a place: start with the rent affordability calculator, compare listings with the rent per square foot calculator, divide it fairly using the rent split calculator, then budget the move with the moving cost calculator and the renters insurance calculator. Wondering whether to buy instead? The rent vs. buy calculator gives your break-even year.
Thinking about getting out: the rent vs. sell calculator puts holding and selling side by side.
Stop Running These in a Spreadsheet
Kelpic tracks rent, expenses, leases, and maintenance for every property you own — so the numbers these calculators ask for are already there, current, and in one place.
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