Percentage Calculator
Calculate percentages, discounts, increases, and more with ease.
How it works
Enter any two values and the free percentage calculator instantly computes the result — whether you need to find what percentage one number is of another, calculate percentage increase or decrease, or find the original value before a percentage change.
Why use this tool?
Used by students for math homework, shoppers to calculate discounts, business analysts for growth metrics, and finance professionals for profit margin calculations. One of the most searched free online calculators.
Frequently Asked Questions
How do I calculate what percentage one number is of another?
Divide the part by the whole and multiply by 100. E.g. 45 out of 60 = (45 ÷ 60) × 100 = 75%. This tool does that calculation instantly.
How do I find X% of a number?
Multiply the number by the percentage and divide by 100. E.g. 20% of 350 = (20 × 350) ÷ 100 = 70. The percentage calculator handles all three variations.
How do I calculate percentage increase or decrease?
Percentage change = ((New Value − Old Value) ÷ Old Value) × 100. A positive result is an increase; negative is a decrease. Enter both values and the tool computes it.
Is this free?
Yes, completely free. All calculations happen instantly in your browser.
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