About Codezyra

Codezyra is a collection of 110+ free online calculators and tools, built by a small software team based in Lahore, Pakistan. Our goal is simple: give you a correct answer quickly, explain how it was worked out, and keep your data private.

What we build

Our tools are organised into these areas:

How our tools are built and checked

Standard formulas. Each calculator uses the published, widely accepted formula for its task — for example the National Weather Service equations for heat index and wind chill, or the standard BMI formula used by health organisations.
Explained, not a black box. The guide under each tool shows the formula and walks through worked examples, so you can verify the result yourself.
Tested against known values. Before a tool is published we check its output against hand-worked examples and reference values.
Private by design. Calculations run in your browser. What you type is not uploaded to our servers.

Found a mistake or want a new tool?

We read every message. If a result looks wrong, tell us the inputs you used and what you expected; if there is a calculator you wish existed, suggest it. Reach us through the contact page or at contact@codezyra.com.

A note on accuracy

Our tools are for general information and planning. For medical, financial, legal or structural decisions, confirm results with a qualified professional. See our Disclaimer.