Free Percentage Calculator Online – Percent of a Number, % Change & More
Calculate percentages, percentage of a value, and percentage change
Features
- X% of Y calculator
- X is what percent of Y
- Percentage increase/decrease
- Instant results
- Free & unlimited use
- No signup required
Frequently Asked Questions
Use the "X is what % of Y" tab — enter the value and the total, and the tool divides and multiplies by 100 automatically.
Yes, the "% Increase/Decrease" tab shows whether the change from one value to another is an increase or decrease, and by how much.
Use the "X% of Y" tab with the discount percentage and original price to find the discount amount, then subtract it from the original price.
((New Value − Old Value) ÷ Old Value) × 100 — the tool calculates this automatically and also handles the reverse case (a decrease) correctly.
Yes — enter any numeric values, including decimals, and the calculation adjusts accordingly.
Yes, completely free with unlimited calculations.
How to Use Percentage Calculator
Using Percentage Calculator is simple and free. No sign-up required.
- Choose a calculation mode (of a value, what percent, or change).
- Enter the required numbers.
- Click 'Calculate'.
- View the instant result.
About Percentage Calculator
Percentage Calculator handles the three percentage calculations people look up most often — finding X% of a number, figuring out what percent one value is of another, and calculating the percentage increase or decrease between two values — all in one tool instead of remembering three different formulas. Useful for calculating a discount, checking a test score percentage, or figuring out how much a price, salary, or metric changed from one period to the next.
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