Percentage Calculator
Calculate percentages online: X% of Y, X is what percent of Y, percentage increase and decrease, with live formulas.
What is Percentage Calculator
Covers the four percentage problems people actually search for: what is X% of Y, X is what percent of Y, percentage increase and percentage decrease. Type numbers into the sentence-style inputs and the result plus the exact formula appear instantly — ideal for pricing, reports and homework checks.
How to use Percentage Calculator
- Pick one of the four modes at the top
- Type numbers into the sentence-style inputs — results update live
- The formula used is shown under every result
Frequently asked questions
What is the formula for percentage increase?
(New value − Old value) ÷ Old value × 100%. Example: from 360 to 890 gives (890−360)/360 = 147.22%. This tool shows the formula with your own numbers filled in.
How do I find what percent X is of Y?
Divide X by Y and multiply by 100. 50 ÷ 200 × 100% = 25%.
What is the difference between percent change and percentage points?
Going from 10% to 12% is +2 percentage points but a +20% relative increase. This tool computes the relative change — quote points when comparing two rates.
Is Percentage Calculator free?
Percentage Calculator is completely free — open the page and use every feature with no hidden charges.
Do I need to download or install Percentage Calculator?
No download or installation is needed. It is an online tool that runs in the browser on your phone, tablet and computer.
Do I need an account to use Percentage Calculator?
No. Use the tool right away — no account or sign-in required.
Does Percentage Calculator work on mobile?
Yes. The page is fully responsive and works on phones, tablets and desktop browsers.