Free • Instant • No Login
Percentage Calculator
Calculate any percentage instantly — no login, no signup.
Error: please enter valid numbers.
X% of Y = —
Formula: (X / 100) × Y
How to use
Choose a mode, enter values, and get the answer instantly
01
X% of Y
Find the value that X% represents of Y. Perfect for discounts and portions.
02
% Increase / Decrease
Compare an original value to a new value and get the percent change.
03
X is what % of Y
Calculate what percent X is of a total Y.
04
% to Fraction / Decimal
Convert a percentage into a decimal and a simplified fraction.
FAQ
Frequently Asked Questions
What is the formula to calculate percentage? +
Percentage = (Value / Total) × 100
How do I calculate X% of a number? +
Multiply the number by X and divide by 100. Example: 20% of 500 = (500 × 20) / 100 = 100
How to calculate percentage increase? +
Percentage Increase = ((New Value - Original Value) / Original Value) × 100
How to calculate percentage decrease? +
Percentage Decrease = ((Original Value - New Value) / Original Value) × 100
What is 100%? +
100% means the whole or complete amount of something.