Work out percentages, increases and decreases instantly. 100% free, no sign-up — nothing ever leaves this browser tab.
Percentage Calculator covers the everyday percentage questions people actually need answered — what's X% of Y, what percentage X is of Y, and what a percentage increase or decrease works out to — with instant results as you type.
Percentages come up constantly in daily and office life: discounts, markups, tax, grades, and growth figures. Rather than doing the math by hand or hunting for the right formula, this tool gives you a clear answer for the most common percentage calculations in one place.
No installs, no accounts — just your browser doing the work.
Scroll up (or tap the button above) to load the tool instantly — no account or install needed.
Add your file, text, or numbers into the tool above.
Sensible defaults are already selected — tweak anything you need.
Your result is generated locally and ready in seconds — no waiting room.
X% of Y, X is what % of Y, and percentage change are all handled.
Your numbers stay in this browser tab and are never uploaded.
Results update the moment you finish typing — nothing to submit.
Because Percentage Calculator runs locally, teams handling sensitive data — finance, HR, legal, operations — can use it without the compliance questions that come with uploading documents to a third-party server.
Yes — enter the before and after values and it works out the change in either direction.
Results are shown to two decimal places for clarity.
No. Percentage Calculator runs entirely in your browser.