About CalcShelf

CalcShelf is a collection of free online calculators and text tools built to give quick, clear answers without sign-ups, pop-ups or clutter.

The site is created and maintained by Haseeb Mukhtar, a web designer and developer based in Lahore, Pakistan. Every tool was built with a simple rule: it should do one job, show the answer immediately and explain how it got there.

How the tools work

All calculations run directly in your browser. The numbers and text you enter are not sent to our servers or stored.

How we keep content accurate

Formulas follow standard published methods, such as the reducing-balance loan formula and the WHO BMI categories. Articles explain the reasoning behind each tool. If you find an error, please contact us and we will review it promptly.

How the site is funded

CalcShelf may show advertising to cover hosting and development costs. Ads never change tool results.