Percentage Calculator
Calculate percentages, changes, and differences instantly
How to Use Percentage Calculator
- Select the type of percentage calculation you need
- Enter your values in the input fields
- Click Calculate to see the result instantly
Key Features
- 4 Calculation Modes - Percent of a number, what percent X is of Y, percent change, and percent difference
- Instant Results - Results displayed with full precision immediately
- No Sign-Up - Free to use with no registration required
Frequently Asked Questions
What is X% of Y?
To find X% of Y, multiply Y by (X/100). For example, 20% of 150 = 150 × 0.20 = 30.
How do I calculate percentage change?
Percentage change = ((New - Old) / |Old|) × 100. A positive result means an increase, negative means a decrease.
What is the difference between percent change and percent difference?
Percent change measures the change from one specific value to another. Percent difference compares two values without a defined "starting" value, using their average as the base.
How do I find what percentage X is of Y?
Divide X by Y and multiply by 100. For example, 30 is what percent of 150? → (30/150) × 100 = 20%.