To increase a number by a percentage, multiply it by (1 + percentage ÷ 100). For example, 200 increased by 15% is 200 × 1.15 = 230.
This is the same engine as the main Percentage Calculator below, focused specifically on the "increase by %" case — the one most people search for when a price, salary, or measurement needs to go up by a certain percent.
How it works
Enter the starting number and the percentage you want to add. The result is the starting number plus that percentage of itself: new value = original × (1 + percent ÷ 100). This is the same math behind salary raises, price markups, and interest calculations.
Examples
- 200 increased by 15% = 230
- 50 increased by 10% = 55
- 1,000 increased by 7.5% = 1,075
Related questions
- What's the formula for percentage increase?
- New value = original value × (1 + percentage ÷ 100). So a 20% increase on 150 is 150 × 1.20 = 180.
- How is this different from percentage change?
- Percentage increase assumes you know the starting value and the percent to add. Percentage change works backward from two known values to find the % difference between them — use the "Percentage Change" tab in the calculator below for that.