Online Percentage Calculator

Six percentage calculators in one — from basic percentage to change, difference, and reverse calculations.

What is X% of Y?

% of = ?

X is what % of Y?

is what % of

Percentage Change (Increase / Decrease)

From to

Y is X% of what number?

is % of ?

Add or Remove a Percentage

Percentage Difference Between Two Values

and

Percentage Formulas Reference

Percentages represent a ratio out of 100. Key formulas: X% of Y = X × Y / 100. Percentage change = (New − Old) / Old × 100. Percentage difference = |A − B| / ((A+B)/2) × 100. Reverse: if Y = X% of Z, then Z = Y / (X/100).