Percentage Calculator

Calculate percentages easily. Find percent of a number, percentage change, increase and decrease.

% of = —
is what % of
Result: —
Result: —
% to = —
Quick Reference
10% of 200= 20
25% of 80= 20
50% of 150= 75
19% VAT on 100= 119
20% off 50= 40
50 → 75= +50%

How It Works

  1. Choose a calculation type: percentage of a number, what percent X is of Y, or percentage change.
  2. Enter the required numbers in the input fields.
  3. The result updates instantly as you type.
  4. Copy the result with one click.

Formula

% of a number:   Result = (P ÷ 100) × N
What % is X of Y: Result = (X ÷ Y) × 100
% change:         Change% = ((New − Old) ÷ Old) × 100

Example

Input: What is 15% of 80?
Result: 12

FAQ

Three: (1) find a percentage of a number, (2) find what percentage one number is of another, (3) calculate percentage increase or decrease.

Yes. In the percentage change section enter the original and new value. A negative result indicates a decrease.

No. All calculations run entirely in your browser. No data is sent to or stored on our servers.

Percentage change = ((New − Old) ÷ Old) × 100. Positive means increase, negative means decrease.