Free Online Tool

Percentage Calculator

Calculate any percentage instantly — discounts, increases, differences and more.

What is X% of Y?
Find a percentage of any number. Perfect for calculating discounts, tips, tax and more.
Result = (Percentage ÷ 100) × Number
Percentage
%
of
Number
Result
—
X is what percentage of Y?
Find out what percentage one number is of another. Useful for test scores, ratios and comparisons.
Result = (X ÷ Y) × 100
Value (X)
of
Total (Y)
Result
—
Percentage Increase or Decrease
Calculate the percentage change from one value to another. Shows whether it is an increase or a decrease.
Result = ((New − Old) ÷ Old) × 100
Original Value
→
New Value
Increase
—
Percentage Difference
Find the percentage difference between two values — neither is treated as the original.
Result = (|V1 − V2| ÷ ((V1 + V2) ÷ 2)) × 100
Value 1
vs
Value 2
Percentage Difference
—
Add or Remove a Percentage
Add or subtract a percentage from a number. Perfect for calculating prices after tax or discount.
Add: Result = Number × (1 + %)  |  Remove: Result = Number × (1 − %)
Number
Percentage
%
After Adding
—
Common Percentage Calculations
10% of 500
= 50  ·  Click to calculate
20% discount on $80
= $16 off  ·  Click to calculate
45 out of 180 as %
= 25%  ·  Click to calculate
100 to 135 — % increase
= 35% increase  ·  Click

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