Percentage Calculator

What is X% of Y?

% of = -

X is what % of Y?

is what % of = -

% Change from X to Y

to = -

How to use this percentage calculator

  1. Use the first calculator to find X% of a value.
  2. Use the second to find what percentage one number is of another.
  3. Use the third to find the percentage increase or decrease between two values.

What's the difference between percentage and percentage points?

Going from 10% to 15% is a 5 percentage point increase, but a 50% relative increase (since 5 is half of 10). This tool's "% Change" calculator shows the relative change, which is usually what's meant in everyday use.

Why is my percentage change negative?

A negative result means the value decreased from X to Y. For example, going from 100 to 80 is a -20% change.

Can I use negative numbers?

Yes, all three calculators handle negative values correctly, though percentage change from zero is undefined and will show as invalid.