CalculatorBench
Free calculators for money, math, and everyday life
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CalculatorBench - Free calculators for money, math, and everyday life

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Free, fast calculators for finance, math, fitness, and everyday decisions — loans, compound interest, BMI, GPA, percentages, tips, unit conversions, and more. No sign-up, no data collection — every calculation runs in your browser and stays on your device.

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Maker
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Hey everyone 👋 I built CalculatorBench because I was tired of googling a simple calculation and landing on a page with 40 ads and a pop-up before I could see the answer. It's a collection of 70+ free calculators — everyday finance (loans, mortgages, compound interest, retirement), math, fitness, GPA, unit conversions, and more. A few things I focused on: No sign-up, no accounts Every calculation runs client-side — your numbers never leave your device Fast, minimal, no clutter Still actively adding calculators and would love feedback on what's missing or what could be clearer. Happy to answer any questions about how it's built too!

How do you handle the accuracy of more complex financial calcs like amortization schedules with extra payments, and are the formulas reviewed by anyone with a finance background or just coded from standard references?

Maker

 The formulas themselves are standard textbook amortization math. To check the outputs, I use AI agents to run through a bunch of test cases and catch edge cases, and I've also hand-verified a few payments myself against manual calculations. Haven't had a finance pro formally review it yet, honestly — but happy to get that done if people think it'd help. Thanks for asking!