About Percentage Change Calculator

This site exists to give you a fast, readable way to compute percentage change for one or many pairs of values. The interface favors compact typography, high contrast, and predictable behavior on phones first.

The project is a static site. That means pages are prebuilt, assets are served from a CDN-friendly bundle, and the calculator logic runs locally in your browser without sending your inputs to a server.

We aim for conservative copy, clear edge case handling, and honest labeling when a result would require dividing by zero or when inputs are incomplete.