Percentage Calculator

Free percentage calculator. Work out what percentage one number is of another, or find a percentage of any value, instantly with the formula and step-by-step explanation.

Percentage

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The part expressed as a percentage of the whole. Both numbers must be provided.

What is a percentage calculator?

A percentage calculator works out the relationship between two numbers as a percentage. The most common question it answers is: what percentage is the part of the whole? For example, if 25 out of 200 visitors bought a product, the percentage calculator tells you that 12.5% of visitors converted.

The core formula is (part / whole) × 100. The result is a share expressed out of 100, which makes it easy to compare values of very different sizes. A percentage calculator applies this formula instantly and removes the risk of arithmetic slips, especially with decimals or large numbers.

Percentages are everywhere: discounts, test scores, tax rates, battery life, survey results. A reliable percentage calculator lets you move between fractions, decimals, and percentages without reaching for a spreadsheet, so you can answer everyday questions in seconds.

How to calculate a percentage

  1. 1

    Enter the part

    Type the number that represents the share you want to measure, such as the number of items, points scored, or visitors who converted.

  2. 2

    Enter the whole

    Type the total or reference value the part is being compared against, such as total items, maximum points, or all visitors.

  3. 3

    Read the percentage

    The calculator applies (part / whole) × 100 and shows the percentage, so you can compare the share across different totals.

Why use this percentage calculator?

Instant and accurate

No mental arithmetic or spreadsheet formulas. Get the exact percentage the moment both numbers are entered.

Works for any values

Test scores, discounts, survey results, tax, tips — any pair of numbers where one is a share of the other. Decimals are supported.

Transparent method

Every result is built on the same simple formula, so you can verify the math and reuse it for future problems.

FAQ

Frequently Asked Questions

Quick answers to common questions about percentage calculations.

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