What's the difference between percentage and percentage points?

Going from 10% to 12% is a 2 percentage-point rise, but a 20% increase in relative terms. The "% change" mode gives the relative figure.

How do I reverse a percentage?

To find the original before an X% increase, divide the new amount by (1 + X/100). For a discount, divide by (1 − X/100).

Percentage Calculator

Calculate percentages, percentage increase/decrease, and "what percent of" instantly.

UPDATED · MAY 2026

Calculation

Percentage

Of value

20% of 80

16.00

Percent

20%

Base value

80.00

How to use the Percentage Calculator

01
Pick a mode. Choose "% of", "is what %", or "% change" depending on what you're solving.
02
Enter your two numbers. The fields relabel to match the mode you picked.
03
Read the answer. The result updates live as you type.

How is it calculated?

"% of" multiplies: X% of Y = (X ÷ 100) × Y. "Is what %" divides the part by the whole: (A ÷ B) × 100. "% change" measures growth from an old to a new value: ((new − old) ÷ old) × 100, where a negative result is a decrease.

Frequently asked

The questions readers ask most about the percentage calculator.

Use the "% change" mode: enter the original value as "from" and the new value as "to". The result is the percentage increase (or decrease, if negative).

How to use the Percentage Calculator

How is it calculated?

Frequently asked

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