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Free Percentage Calculator
Quickly calculate percentages with this free online tool. Find what percentage one number is of another, calculate a percentage of a total, or compute percentage increases and decreases. Results update instantly as you type.
Frequently asked questions
How do I calculate a percentage?
To find X% of Y, multiply Y by X and divide by 100. For example, 15% of 200 = 200 × 15 ÷ 100 = 30.
How do I calculate percentage increase?
Percentage increase = ((New Value - Old Value) / Old Value) × 100. For example, going from 80 to 100 is a 25% 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 what percent of 200? 30 ÷ 200 × 100 = 15%.
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