Percentage Calculator
What is X% of Y?
X is what % of Y?
Percentage change from X to Y
Free Online Percentage Calculator
Our free percentage calculator lets you quickly solve the three most common percentage problems. Whether you need to find a percentage of a number, determine what percent one value is of another, or calculate the percentage change between two values, this tool delivers instant, accurate results. All calculations update in real time as you type — no buttons to click and no page reloads.
How to Use
Enter values into any of the three calculator sections above. In the first section, enter a percentage and a number to find that percentage of the number. In the second section, enter two numbers to find what percentage the first is of the second. In the third section, enter an original value and a new value to see the percentage increase or decrease. Results appear instantly as you type.
FAQ
How do I calculate a percentage of a number?
Multiply the number by the percentage and divide by 100. For example, 25% of 200 is (25 / 100) × 200 = 50.
How do I find what percentage one number is of another?
Divide the first number by the second and multiply by 100. For example, 50 is (50 / 200) × 100 = 25% of 200.
What is the formula for percentage change?
Percentage change = ((New Value - Old Value) / |Old Value|) × 100. A positive result indicates an increase, while a negative result indicates a decrease.