Practical calculators and plain answers

Tools that give you a number, and guides that tell you what to do next.

Every calculator on this site is free, built to answer one real question - how much is the payment, what will it cost me, or how long will it take. Whether you are shopping for a loan, planning a car purchase, projecting retirement savings or estimating materials for a home project, the tool you need is a click away.

Each calculator is paired with a plain-language guide that explains what the result means and how to use it. The numbers are calculated in your browser, so nothing you type is stored or sent anywhere - your figures stay private.

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Home buyers tend to start with the mortgage calculator to see a true monthly payment, then the loan calculator for a car or personal loan. Savers reach for compound interest and the retirement projector, while weekend DIYers estimate materials with the concrete, mulch and paint calculators. Browse all tools or read a guide when you want the reasoning behind the number.