Percentage Calculator
Result
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Calculate percentages in three ways: find X% of any number, find what percentage one number is of another, or calculate the percentage change between two values. Instant results with no signup. Used for discounts, taxes, grade calculations, and financial planning.
Three steps. No setup.
Drop your content into the field above, or type directly into it. The tool starts working the moment you do — no button to press.
Everything is calculated locally in your browser as you type. No waiting, no uploading, no server involved.
Hit Copy to grab the result, or Download if the tool offers a file. Close the tab — nothing is stored.
Free, private, and built to last.
Percentage Calculator is a free online tool that runs entirely in your browser. No data is sent to any server — your input stays private on your device and disappears the moment you close the tab.
It is designed to be fast, simple, and accessible to everyone — whether you are a developer, marketer, student, or business owner. No signup, no ads, no nonsense. Just the tool, ready when you need it.
Frequently Asked Questions
Multiply the number by the percentage and divide by 100. For example, 20% of 500 = 500 × 20 ÷ 100 = 100. Use the 'X% of Y' mode in this calculator to get the result instantly.
Percentage change = ((New Value − Old Value) ÷ Old Value) × 100. A positive result is a percentage increase; a negative result is a percentage decrease. For example, a change from 80 to 100 is a 25% increase.
Divide the first number by the second number and multiply by 100. For example, 50 is what percentage of 200? 50 ÷ 200 × 100 = 25%. Use the 'X is what % of Y' mode in this tool.
Percentage increase means the new value is higher than the old value — the change is positive. Percentage decrease means the new value is lower — the change is negative. Both use the same formula; the sign tells you the direction.
Yes. For simple percentages, use mental shortcuts: 10% of any number = move the decimal point one place left. 5% = half of 10%. 25% = divide by 4. 50% = divide by 2. For more complex calculations, use this free tool.