Percentage Calculator — Complete Guide
Percentage calculations come up constantly in everyday life — calculating a tip, figuring out how much you save in a sale, working out what portion of a budget was spent, or understanding what a percentage increase means in real numbers. This tool handles the most common percentage calculations instantly.
What you can do with Percentage Calculator
- Calculating what percentage one number is of another (e.g., 45 out of 180 is what percent?)
- Finding a percentage of a value (e.g., 15% of 240)
- Working out how much you save at a given discount percentage
- Calculating tax amounts on a price
- Converting fractions to percentages for reports and presentations
How to use Percentage Calculator
Choose the type of calculation you need
Enter the values in the fields provided
The result is calculated instantly
Tips for best results
To find what percentage A is of B: divide A by B and multiply by 100
To find a percentage of a number: multiply the number by the percentage divided by 100
Percentages can exceed 100% when the value is greater than the whole — this is common in year-over-year growth figures
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Frequently asked questions
What is the difference between percentage and percentage points?
A percentage is a proportion expressed out of 100. Percentage points measure the difference between two percentages. If something increases from 20% to 25%, that is a 5 percentage-point increase, but a 25% relative increase.
How do I calculate percentage change?
Subtract the old value from the new value, divide by the old value, and multiply by 100. A positive result is an increase, negative is a decrease. Use the Percentage Change Calculator tool for this.