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Percentage Calculator — Calculate % Instantly

Calculate percentages instantly. Free, no signup required.

Percentage calculations come up constantly in everyday life — calculating a restaurant tip, working out how much you save in a sale, understanding whether your salary increase beats inflation, or checking your exam score as a percentage. This tool offers three different percentage calculations in one place: finding a percentage of a number (what is 15% of 240?), expressing one number as a percentage of another (30 is what percent of 240?), and calculating percentage change between two values (how much did the price increase from 200 to 240?). Each calculator updates instantly as you type.

What is X% of Y?

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How to use

  • • Choose the type of percentage calculation above
  • • Enter your numbers and the result appears instantly

Three Types of Percentage Calculation

Type 1 — Finding a percentage of a number: Used for calculating discounts, tips, commission, and tax. A 20% discount on a 5,000 item saves 1,000.

Type 2 — Expressing one number as a percentage of another: Used in academic scoring and performance metrics. Scoring 68 out of 80 on an exam represents 85%.

Type 3 — Percentage change between two values: Used in finance and data analysis. A price increase from 200 to 240 is a 20% increase. A drop from 500 to 375 is a 25% decrease.

Frequently Asked Questions

How do I calculate what percentage one number is of another?

Use the second calculator on this page: enter both numbers and it shows what percentage the first number is of the second.

How do I calculate a percentage increase?

Use the third calculator: enter the original value and the new value to see the percentage increase or decrease.

What is 20% of 50?

20% of 50 is 10. Use the first calculator: enter 20 as the percentage and 50 as the number.

How do I calculate a discount?

Enter the original price and the discount percentage in the first calculator to find the discount amount.

What is the formula for percentage change?

Percentage change = ((New Value - Original Value) / Original Value) × 100. A positive result means an increase, negative means a decrease.