Percentage Calculator
Calculate percent of a number, what percent one number is of another, reverse percentage, percentage change, and add or subtract a percentage.
What this percentage calculator covers
English search results treat a percentage calculator as a broad hub: percent of a number, what percent one number is of another, reverse percentage, percentage increase or decrease, and adding or subtracting a percentage.
- Use percent of a number for discounts, tips, portions, and quick shares.
- Use A is what percent of B for conversion rates, completion rates, and part-to-whole questions.
- Use reverse percentage when a known part and its percentage should recover the whole.
- Use percentage change when there is a clear old value and new value.
- Use percentage difference when two values are peers and order does not matter.
- Use add/subtract percent for markups, markdowns, and simple adjustment scenarios.
Core percentage formulas
R is the result, P is the percentage, and N is the base number.
P is the percent, A is the part, and B is the whole.
W is the whole when a known part A equals P percent.
Use plus for an increase and minus for a decrease.
Choosing the right percentage mode
| Question | Use |
|---|---|
| What is 20% of 150? | Percent of a number |
| 30 is what percent of 120? | A is what percent of B |
| 150 is 15% of what? | Reverse percentage |
| From 80 to 120 | Percentage change |
| Compare 80 and 100 | Percentage difference |
| Add 12% to a value | Add or subtract percentage |
Frequently Asked Questions
Sources and References
- Percentage CalculatorCalculator.com
- Percentage Calculator onlineCalcuPercent
- Percentage CalculatorPearson
- Percentage - Math is FunMath is Fun
- PercentageWikipedia
- Percentage pointWikipedia
Calculations are based on the listed reference sources. Links open in a new tab.
Related Tools
Find what a percent of a number is, such as 20% of 150, with quick percent presets and simple examples.
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