What can I calculate?

Discount prices, test scores, year-over-year change, composition ratios — any everyday or business percentage math.

Can I calculate sales tax?

Yes — use the markup mode with a tax rate to get the tax-inclusive price.

Completely free, and runs entirely in your browser.

Percentage Calculator

Five of the most common percentage calculations collected into one tool — discount, markup, percent-of, percent-what, and percent change. Shows the formula next to every answer so you can double-check the math.

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Practical Guide

A set of browser-based image tools for compression, conversion, cropping, metadata checks, and privacy-friendly masking. Useful before publishing images on social media, preparing web assets, or cleaning up presentation materials.

When this tool is useful

Percentage Calculator helps with common Image Tools tasks that require quick checking, conversion, or creation. It supports workflows such as Five percentage calculation patterns in one tool, Discount, markup, and percent-change modes without forcing users to switch pages or apps.

Processing and privacy

Your input is processed in the browser and is not designed to be sent to a server just to use the tool. This makes it suitable for temporary checks, draft work, and pre-publication cleanup.

Workflow tip

After checking the result, use the related tools and same-category links near the bottom of the page to continue the surrounding task. Frequently used tools also appear in the Recently Used section.