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Percentage Calculator

Calculate a percentage of a number, find what percentage one value is of another, or calculate percentage change.

Use the tool

Free to use in your browser. Calculations happen locally on this device.

Result30
Formula15% × 200

About this tool

A browser-based calculator for common percentage calculations, including percentage-of-value, percentage share, and percentage change. Percentage change uses the absolute starting value as the denominator.

CPV Technologies provides this utility for general informational use. Check input values and assumptions before relying on a result.

Want a walkthrough?

Read the step-by-step guide to the Percentage Calculator for examples, tips and answers to common questions, or browse all guides.