Percent Calculator

Calculate percentages, percentage change, discounts, increases, decreases, and ratios in one focused tool.

Calculation type

What is B% of A?

Find the percentage amount from a base number.

Example: 20% of 5,000 = 1,000

Base numberPercentage

Decimal places

Result

1,000

5,000 * 20% = 1,000

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Common percentage calculations

Use the calculator to answer questions such as what percent of a number is, how much a discount changes a price, or how large an increase is between two values. Switching calculation type updates the labels and formula so the meaning of each input stays clear.

When to compare decimal places

For shopping, budgeting, and quick estimates, zero or one decimal place is often enough. For analytics, conversion rates, or financial comparisons, use two to four decimal places to avoid hiding small changes.