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Percentage Calculator

Four percentage calculators in one: find a percent of a number, percent change, what percent X is of Y, and more.

What is % of ?

is what % of ?

Percentage change from to

is % of what?

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About This Calculator

Four common percentage calculations, all on one page:

X% of Y: e.g. "What is 20% of $150?" → $30
X is what % of Y: e.g. "30 is what % of 150?" → 20%
Percentage change: e.g. "From 80 to 100" → +25% increase
X is Y% of what: e.g. "30 is 20% of what?" → 150

Percentage change formula

(New Value – Old Value) / |Old Value| × 100 = % change