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Percentage Calculator

Percent of a number, percent change, and more.

Result
30

Percentage Calculator 소개

Percentage questions usually fall into four shapes: “what is 20% of 150,” “what percent of 150 is 30,” “30 is 20% of what number,” and “what's the percent change from 100 to 125.” The math is simple, but it's easy to divide the wrong way by hand. This tool switches between the four modes with tabs — just enter two numbers and read the result. Useful for sale prices, test score percentages, and checking revenue growth or decline. Percentage change is computed against the absolute value of the starting number; it can't be calculated when the starting value is zero.

사용 방법

  1. Pick the calculation type from the tabs
  2. Enter the two numbers
  3. Read the result

자주 묻는 질문

Can it show a negative percentage change?

Yes. When the ending value is smaller than the starting value, the result is negative (a decrease).

Can results go over 100%?

Yes. In “what percent” mode, if the part is larger than the whole, the result exceeds 100%.

Is my input sent anywhere?

No. All calculation runs in your browser; nothing is sent to toco.tools servers.