Percentage Calculator

How to use

Three percentage calculations are available. Results appear automatically as you type.

1. B% of A — e.g. the discount amount for 20% off a $50 item
2. A is what % of B — e.g. what share 37 completed items are of a 100-item goal
3. Percent change from A to B — e.g. the increase rate when a price goes from 1200 to 1500

Examples

• "20% of 5000" → 1,000
• "37 is what % of 100" → 37%
• "Change from 1200 to 1500" → +25%

FAQ

Can I use decimals?

Yes. Decimal input is supported and results are shown to 4 decimal places.

How do I read a negative change rate?

Negative means a decrease. For example, "-20%" is a 20% drop.

Can I calculate sales tax?

Yes. In "B% of A", set A to the price and B to your tax rate.