Percentage Calculator
Free percentage calculator — updated for 2025. Accurate, instant, no sign-up needed.
%
Percentage Calculator
Three modes: find %, find value, find % change
① What is X% of Y?
%
Result: —
② X is what % of Y?
Result: —
③ Percentage Change from X to Y
Result: —
Percentage Formulas
X% of Y = (X/100) × Y
X is what % of Y = (X ÷ Y) × 100
% Change = ((New − Old) ÷ Old) × 100
How do I calculate a discount?
Use formula ①: "What is 20% of $85?" = $17 discount. Subtract from original: $85 − $17 = $68 sale price.