About PercentConverter

PercentConverter is a small collection of percentage calculators built for one purpose: answering a quick math question without friction. No account, no app download, no paywall — just enter your numbers and get an answer, along with the formula behind it so you can see exactly how the result was reached.

The site covers the percentage calculations people run into most often: finding a percentage of a number, tracking a percentage increase or decrease, working out a discount at checkout, splitting a tip, comparing profit margins, and converting between percents and decimals.

Why we show the formula

A calculator that only hands back a number is a black box. Every result on this site is paired with the formula used to get there, so students can check their homework, professionals can double-check a figure, and anyone curious can learn the underlying math rather than just copying an answer.

Accuracy

Calculations use standard, widely accepted formulas (shown alongside each result). That said, this site is a convenience tool, not a substitute for professional financial, tax, or accounting advice — please verify important figures independently before relying on them.

Contact

Spotted an error or have a calculator you'd like to see added? We'd like to hear about it — email us at contact@percentconverter.com.