About Calzy

Calzy is a free online calculator collection built for speed, accuracy, and privacy. No sign-up, no data collection — just instant answers.

What is Calzy?

Calzy is a free, ad-supported collection of everyday calculators covering health, finance, math, and date calculations. Every calculator is designed to give you not just a number, but an interpretation — so you understand what the result actually means for you.

Privacy First

Every calculation on Calzy happens entirely inside your browser. We do not send your inputs to any server. There is no account, no tracking of what you calculate, and no personal data stored anywhere. The only exception is a single language-preference cookie stored locally on your device.

Who We Are

Calzy is an independent project built by a small team of developers passionate about making useful tools accessible to everyone, in any language. The site is available in English and Korean, with country-specific calculation logic where relevant (for example, income tax brackets per country).

Contact

Have a question, found an error in a calculation, or want to suggest a new calculator? We read every message.

calzy.help@gmail.com