Percentage Calculator
Work out any common percentage: X% of Y, what percent, increase, decrease and reverse percentage.
What is X% of Y?
%of
—Result
X is what % of Y?
is what % of
—Result
Percentage change
fromto
—Change
Percentage formulas
X% of Y = Y × X / 100. “X is what % of Y” = X / Y × 100. Percentage change = (new − old) / old × 100.
Frequently asked questions
How do I calculate X% of Y?
Multiply Y by X and divide by 100. Example: 18% of 2,500 is 450.
How do I find a percentage increase?
((new − old) / old) × 100. A price from 80 to 100 is a 25% increase.
What is a reverse percentage?
If 1,180 already includes 18%, the base is 1,180 / 1.18.
Is this for GST too?
Use the dedicated GST calculator for CGST/SGST/IGST. This tool is the general math.
Private?
Yes. No data is sent anywhere.
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