Percentage Calculator
Calculate any percentage instantly. Free, private, no sign-up.
What is X% of Y?
% of
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X is what % of Y?
is what % of
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Percentage change from old to new
to
Change: —
How percentages work
- X% of Y = (X ÷ 100) × Y. Example: 20% of 150 = 0.20 × 150 = 30.
- X is what % of Y = (X ÷ Y) × 100. Example: 45 is (45 ÷ 180) × 100 = 25% of 180.
- Percentage change = ((New − Old) ÷ Old) × 100. Positive means increase, negative means decrease.