How do I calculate percentage change?

Choose the percentage change mode, enter the original and new values, and the tool calculates the increase or decrease automatically.

Can I find what percent one number is of another?

Yes. Use the "what percent is X of Y" mode to get that ratio expressed as a percentage instantly.

Does it handle negative percentage changes?

Yes. A decrease is shown as a negative percentage change, matching how it would appear in reports or spreadsheets.

Percentage Calculator

Calculate percentages, percentage change, and what percent one number is of another — three common calculations in one simple tool.

Calculation type

Value X

Value Y

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Overview

Calculate percentages, percentage change, and what percent one number is of another — three common calculations in one simple tool.

Benefits

Three calculation modes in one tool
Instant results, no formulas to remember
Handles increases and decreases
Free, no signup required

Use Cases

Calculating sale discounts and markups
Working out grade or score percentages
Tracking percentage change in business metrics
Checking tip or commission amounts

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How to Use

Select the calculation type you need — percent of a number, percentage change, or what percent X is of Y.
Enter your numbers.
View the result instantly.

FAQ

How do I calculate percentage change?: Choose the percentage change mode, enter the original and new values, and the tool calculates the increase or decrease automatically.
Can I find what percent one number is of another?: Yes. Use the "what percent is X of Y" mode to get that ratio expressed as a percentage instantly.
Does it handle negative percentage changes?: Yes. A decrease is shown as a negative percentage change, matching how it would appear in reports or spreadsheets.

About Percentage Calculator

Solve everyday percentage problems for shopping, finance, grades, and business metrics. Switch between percentage-of, percentage-change, and ratio calculations without doing the math by hand.