Percentage Calculator

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of
Result
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What is X% of Y? — enter a percentage and a number.
Quick Examples
Quick Tips
  • To find 10% of a number, simply move the decimal one place left.
  • Percentage change = ((New − Old) / |Old|) × 100
  • To add X% to a number, multiply by (1 + X/100).
  • To remove X% from a number, multiply by (1 − X/100).
  • 50% of a number is just half of it.
History
No calculations yet

About Percentage Calculator

The Percentage Calculator is a versatile math tool that handles four types of percentage calculations in one place. Find what percentage one number is of another, calculate a percentage of any value, determine percentage increase or decrease between two numbers, and find what part a number is of a total — all instantly and without any manual formulas. Whether you're calculating discounts, markups, tax amounts, exam scores, or financial changes, this tool gives you accurate results in seconds. The built-in history feature also lets you refer back to recent calculations without re-entering values.

How to Use

Basic Percentage (What is X% of Y?):

  1. Enter the percentage value (e.g., 15).
  2. Enter the number you want to calculate the percentage of (e.g., 500).
  3. Click Calculate — result: 75.

Find Percentage (X is what % of Y?):

  1. Enter the number (X) and the total (Y).
  2. Click Calculate to find what percentage X is of Y.

Percentage Change:

  1. Enter the original value and the new value.
  2. Click Calculate to see the percentage increase or decrease.

Percentage of Total:

  1. Enter a part value (X) and a total (Y).
  2. Click Calculate to see what percentage X is of Y.

Frequently Asked Questions

Enter 20 in the percentage field and 1500 in the number field under "Basic Percentage", then click Calculate. The answer is 300.

Use the "Percentage Change" tab, enter 80 as the original value and 100 as the new value. The result is a 25% increase.

The basic formula is: Percentage = (Part / Whole) × 100. For example, if you scored 45 out of 60, your percentage is (45/60) × 100 = 75%.

Yes. Use "Basic Percentage" to find X% of the original price. That result is the discount amount. Subtract it from the original price to get the discounted price.

Yes, completely free with no sign-up required.

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