Percentage Calculator

Calculate percentages, percentage increase/decrease, and reverse percentages instantly. Free, accurate, and mobile-friendly.

Instant ResultsMobile FriendlyFree to Use
%
The percentage value.
#
The total value.
Result
0
Enter values to calculate.

Understanding Percentages

Percentages are a fundamental part of daily life, from calculating tips at a restaurant to understanding interest rates on a loan. A percentage represents a fraction of 100, making it easier to compare different quantities.

Common Uses

  • Discounts: Calculating how much you save during a sale.
  • Tips: Determining the gratuity for a service.
  • Finance: Understanding interest rates, taxes, and investment returns.
  • Statistics: Analyzing data and trends.

How to Calculate

The basic formula for finding a percentage is:

(Part / Whole) × 100 = Percentage

For example, if you have 20 apples and 5 are red, the percentage of red apples is (5 / 20) × 100 = 25%.

Frequently Asked Questions

Common questions about percentage calculations.

How do I calculate a percentage increase?

To calculate percentage increase: Subtract the original value from the new value, divide by the original value, and multiply by 100.

What is the reverse percentage formula?

To find the original value before a percentage increase/decrease, divide the final value by (1 ± percentage/100).

Is this calculator free?

Yes, this percentage calculator is completely free to use for all your mathematical needs.

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