Percentage Calculator
Work out any percentage in seconds — a percent of a number, the change between two numbers, or what share one number is of another. Everything runs in your browser, so your numbers never leave your device.
How it works
Pick a mode, type your two numbers, and the result appears instantly. Switch modes any time to answer a different percentage question with the same inputs.
Formula and source
Percent of: part = (percent ÷ 100) × whole. Change: (new ? old) ÷ |old| × 100. Share: (part ÷ whole) × 100. Standard arithmetic. Source: Standard arithmetic.
Worked examples
- 20{d22ed4253049e3f8ac8a2476ba66be74662354cd56801a0460dd56fc19902ca9} of 150 ? 30
- Change from 45 to 60 ? +33.33{d22ed4253049e3f8ac8a2476ba66be74662354cd56801a0460dd56fc19902ca9}
Tips
- Percent change needs a non-zero starting value.
- A 50{d22ed4253049e3f8ac8a2476ba66be74662354cd56801a0460dd56fc19902ca9} increase followed by a 50{d22ed4253049e3f8ac8a2476ba66be74662354cd56801a0460dd56fc19902ca9} decrease does not return to the start.
- For shop discounts, the sale price is (100 ? discount){d22ed4253049e3f8ac8a2476ba66be74662354cd56801a0460dd56fc19902ca9} of the original.
FAQ
How do I calculate X percent of Y?
Divide X by 100 and multiply by Y. For example, 20{d22ed4253049e3f8ac8a2476ba66be74662354cd56801a0460dd56fc19902ca9} of 150 is 0.20 u00d7 150 = 30.
How do I find the percent change between two numbers?
Subtract the old number from the new one, divide by the old number, and multiply by 100.
What is the difference between percent and percentage points?
A move from 20{d22ed4253049e3f8ac8a2476ba66be74662354cd56801a0460dd56fc19902ca9} to 25{d22ed4253049e3f8ac8a2476ba66be74662354cd56801a0460dd56fc19902ca9} is a 5-percentage-point rise but a 25{d22ed4253049e3f8ac8a2476ba66be74662354cd56801a0460dd56fc19902ca9} relative increase.
How do I find what percent one number is of another?
Divide the part by the whole and multiply by 100. For example, 30 is 20{d22ed4253049e3f8ac8a2476ba66be74662354cd56801a0460dd56fc19902ca9} of 150.
Is the percentage calculator free?
Yes, completely free with no signup.
Is my data stored?
No. All calculations happen locally in your browser.