Percentage Increase Calculator
Increase any number by a percentage below. Here is the formula and a couple of worked examples so you can do it by hand too.
Increase a number by a percent
Increased value
230
Amount added
30
How to increase a number by a percentage
Multiply the number by the percentage and divide by 100 to get the increase, then add it back: new value = value × (1 + percent ÷ 100).
Example: increasing 200 by 15% adds 200 × 15 ÷ 100 = 30, giving 230.
Finding the percentage increase between two numbers
If you already know the old and new values, the percentage increase is (new − old) ÷ old × 100. Going from 200 to 230 is (30 ÷ 200) × 100 = 15%.
Frequently asked questions
How do I increase a number by a percentage?
Multiply the number by the percentage, divide by 100, then add the result to the original number. For a 15% increase on 200: 200 + (200 × 0.15) = 230.
How do I calculate a salary increase?
Enter your current salary and the raise percentage above. For example, a 5% raise on 40,000 adds 2,000, giving 42,000.