HeroTools / Productivity
Local · Private · Free

Percentage Calculator

Percent of a number, percentage change, discounts and tax/VAT — answered instantly as you type, right on your device.

Currency for money tools

Calculated locally — nothing is sent anywhere.

Every percentage question, one place

From a quick tip to a sale price to backing VAT out of a receipt, the formulas are easy to get subtly wrong by hand — a percentage change isn't the same as a percentage point, and "remove 20% tax" is not the same as "subtract 20%". This tool uses the correct maths for each case, runs entirely in your browser, and is free forever.

About Percentage Calculator

Percentage Calculator is a free, private productivity tool that runs entirely in your web browser. Percentages, % change, discounts and tax/VAT — all in one place. Because everything happens locally on your device, your files and data are never uploaded to a server, there is no sign-up or installation required, and it keeps working offline. It is handy for percentage, percent, discount, vat. Like every HeroTool by Digital Heroes, Percentage Calculator is 100% free with no limits.

How to use Percentage Calculator

  1. Open Percentage Calculator — it runs entirely in your browser, with no signup.
  2. Fill in the fields or choose the options you want.
  3. Adjust the options to match exactly what you need.
  4. Copy or download your result — it is free, and your data stays on your device.

Frequently asked questions

Is Percentage Calculator free?

Yes — Percentage Calculator is completely free for everyone. No sign-up, no account and no usage limits.

Is it private? Are my files uploaded anywhere?

No. Percentage Calculator runs entirely in your browser on your own device, so your data never leaves your computer and nothing is uploaded to a server.

Does it work offline?

Yes. HeroTools is a Progressive Web App — once the page has loaded it keeps working offline, and you can install it as an app from your browser.

Do I need to install anything or create an account?

No. Just open the page and start using it. Installing it as an app is optional and only adds offline convenience.

What does Percentage Calculator do?

Percentages, % change, discounts and tax/VAT — all in one place.

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