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Percentage Calculator
Find X% of Y, what percent X is of Y, and percentage change
Runs locally in your browser
Parameters
Results
- Result
- 30
- Expression
- 20% of 150
How it works
Solves everyday percentage problems: X% of Y, what percent X is of Y, and percentage change between two values.
Who it's for: Students, shoppers, analysts, and anyone who needs quick percent math without a spreadsheet.
Supports three modes: percent-of, part-of-whole, and percentage change.
Percentage change uses (new − old) / |old| × 100.
How to use
- Choose Mode for the question you want to answer.
- Enter X and Y as described by the selected mode.
- Read Result or Percentage — and Difference for change mode.
Good to know
- For discounts and sale prices, use the Discount Calculator for dollar savings.
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