Percent Increase Calculator
Use this calculator two ways: find the percent increase from an original value to a larger one, or increase a number by a given percentage. Either way you see the percent, the new value and the amount added.
- New value
- 65
- Amount of increase
- 15
Saved setups
Save a set of inputs you reuse — your usual rate, your loan, your room sizes — and load it back in one tap.
Your recent calculations
Results you calculate here are kept on this device so you can come back to them.
Formula
How to use it
- Choose whether you are finding the percentage or applying one.
- Enter the original value.
- Enter either the new value or the percentage to add.
- Read the percent increase, the new value and the amount of the increase.
Worked examples
From 50 to 65
- Percent increase
- 30%
- Amount of increase
- 15
Increase 200 by 15%
- New value
- 230
- Amount of increase
- 30
Increases above 100%
A 100% increase means the value has doubled, 200% means it has tripled, and 900% means it is ten times as large. “Three times as much” and “a 300% increase” are not the same thing: three times as much is a 200% increase.
Undoing an increase
To reverse a percent increase you need a smaller percent decrease, because it is applied to a larger number. After a 30% increase, a 23.08% decrease returns you to the start (1 ÷ 1.30 = 0.7692).
Adding a percentage is the same as multiplying: +15% is × 1.15, +7.5% is × 1.075.
Questions people ask
What is the percent increase from 50 to 65?
30%. The increase is 15, and 15 ÷ 50 = 0.30.
What is 200 increased by 15%?
230. 15% of 200 is 30, and 200 + 30 = 230.
What does a 100% increase mean?
The value has doubled. Going from 40 to 80 is a 100% increase.