Math & conversions
Percentage calculator
Calculate a percentage, an increase or a discount.
Your result
Percentage amount
30
After increase230
After discount170
Rounded for display. See method below.How it works
Part = amount × percentage ÷ 100. Add or subtract the part for an increase or discount.
What to keep in mind
The discount applies once to the starting amount. This does not calculate percentage change between two values.
Worked example
Starting amount: 200; Percentage (%): 15.
Percentage amount: 30 · After increase: 230 · After discount: 170.