About CalcHub

CalcHub is a free collection of 32 online calculators and converters covering finance, health, math, date & time, converters. Every tool runs instantly in your browser. Nothing you type is sent to a server, and you never need an account.

Our principles

• Show the math. Every calculator page explains the formula it uses and walks through a worked example, so you can verify the result yourself.
• Fast and lightweight. Pages are statically generated and load in a fraction of a second, even on slow connections.
• Private by design. Calculations happen entirely on your device. We never see the numbers you enter.

A note on accuracy

We take care to use standard, well-documented formulas and test the results, but the output of any calculator is only as good as its inputs and assumptions. Results are provided for information only and are not financial, medical, or legal advice. For decisions that matter, consult a qualified professional.

Spotted an error or want a new calculator? Get in touch.