Percentage Calculator
Calculate percentages, percent-of values, and percentage comparisons instantly.
Find x% of y.
50
About the percentage calculator
How this calculator works
This page combines the three percentage tasks people use most often: finding a percent of a number, finding what percent one value is of another, and increasing or decreasing a starting value by a percentage.
The calculator updates instantly as you type, which makes it useful for shopping math, school assignments, dashboards, and quick business checks.
Where it is useful
Percentages show up in pricing, grades, growth reports, tax calculations, and performance comparisons.
Keeping the three related modes in one tool makes it easier to move between everyday percent questions without re-entering numbers somewhere else.
- Calculate discounts, tips, commissions, and taxes.
- Check conversion rates, completion rates, and score percentages.
- Increase or decrease a starting value by a chosen percentage.
Example calculations
3 examples25% of 200
50
45 is what percent of 60
75%
200 increased by 15%
230
increase by percent
Common uses
3 ideas- Calculate discounts, tips, commissions, and taxes.
- Check conversion rates, completion rates, and score percentages.
- Increase or decrease a starting value by a chosen percentage.
FAQ
3 answersHow do I find 25% of 200?
Use the percent-of mode and enter 25 for the percent value plus 200 for the base value. The result is 50.
When should I use the what-percent mode?
Use the what-percent mode when you know the part and the whole and want the percentage relationship between them.
Can this calculator handle negative values?
Yes. Negative numbers work in the same formulas as long as the inputs are valid numeric values.