Percentage Calculator
This tool lets you calculate any percentage of a number quickly and accurately, whether you want to find the value of a certain percentage, work out a discount, calculate a percentage increase or decrease, or find the percentage difference between two numbers. The tool is completely free and requires no sign-up or app download.
Percentage Calculators
Percentage Calculator
Find what X% of a number is, instantly.
The interactive percentage calculator tool appears here
How to Calculate a Percentage
Enter the percentage you want to calculate, then enter the number you want to calculate it from, and click "Calculate" to see the result instantly. The formula used is simple: Result = (Percentage ÷ 100) × Number.
To calculate what percentage one number is of another, divide the smaller (part) value by the larger (whole) value, then multiply the result by 100. For example, to find what percentage 14 is of 70: (14 ÷ 70) × 100 = 20%.
How to Calculate Percentage Increase or Decrease
To find a percentage increase, subtract the original number from the new number, divide that difference by the original number, then multiply by 100. The formula is: ((New Value − Old Value) ÷ Old Value) × 100.
A percentage decrease is calculated the same way — if the result is negative, it represents a decrease rather than an increase. This is useful for tracking price changes, salary raises, or drops in sales and performance over time.
When Do You Need a Percentage Calculator?
Percentages come up in everyday situations — working out a discount while shopping, calculating a salary or price increase, finding commission or tax amounts, working out your percentage marks or grade in an exam, or figuring out any part of a whole, like project completion or test scores.
Percentages are also widely used in finance to track money-related changes such as interest rates, investment returns, or budget allocations, making a reliable percentage calculator useful for students, professionals, and everyday shoppers alike.
Frequently Asked Questions
Is the calculator free?
Yes, the tool is completely free and requires no registration.
How do I calculate a percentage manually?
Divide the percentage by 100, then multiply it by the original number. For example, to find 15% of 200: (15 ÷ 100) × 200 = 30.
How do I calculate my percentage marks?
Divide the marks you obtained by the total possible marks, then multiply by 100. For example, if you scored 450 out of 500: (450 ÷ 500) × 100 = 90%.
What is 20% of 70?
To find 20% of 70, divide 20 by 100 and multiply by 70: (20 ÷ 100) × 70 = 14.
How do I calculate a percentage of an amount?
Divide the percentage by 100 to convert it into a decimal, then multiply that decimal by the total amount. For example, 10% of $250 is (10 ÷ 100) × 250 = $25.
How do I find the percentage difference between two numbers?
Subtract the smaller number from the larger number, divide the result by the average of the two numbers, then multiply by 100 to get the percentage difference.