About Simple Percent Calc

Simple Percent Calc is a free tool for everyday percentage math. Enter your numbers, get the answer immediately, and see the formula when it helps.

Percentage questions come up constantly — checking a discount at checkout, calculating a pay raise, comparing two quotes, figuring out a tip. Each calculator is labelled by what you are trying to find out, not by the name of the formula.

What you can calculate here

• Percentage of a number — what is X% of Y, and what percentage is X of Y
• Percentage change — how much did a value increase or decrease
• Percentage increase — find the new value after adding a percentage
• Percentage decrease — find the new value after subtracting a percentage
• Percentage difference — compare two values without a fixed starting point
• Discount calculator — find the sale price and how much you save

How the site is built

Simple Percent Calc is a static site — plain HTML, CSS, and a small amount of JavaScript. All calculations happen in your browser. No server, no database, no tracking, no account required.

Contact

Questions, corrections, or suggestions are welcome via the contact page.