Landlord Tools

Free Calculators for Landlords
& Real Estate Investors

Run the numbers on any property in seconds. Each calculator opens live inside the Rental Flow app loaded with sample data - no account, no signup, nothing to install.

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Mortgage Payment Calculator

Estimate your monthly principal and interest payment, plus total interest over the life of the loan.

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Cap Rate Calculator

Measure a property's return independent of financing - net operating income over purchase price.

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Cash-on-Cash Return Calculator

See your annual return on the actual cash you put in, after mortgage payments.

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Rent vs. Buy Calculator

Compare the true cost of renting against buying over your expected holding period.

1% Rule Calculator

A fast screen to check whether a rental's monthly rent clears 1% of its purchase price.