Two ways to measure growth
Increase a number by % answers questions like “what's my new salary after a 4% raise?” or “what will $1,450 rent be after a 6% increase?” — it shows the new value, the size of the increase and the multiplier.
Find the % increase compares an old and a new value, such as last year's and this year's sales, a stock price or your electricity bill. If the second value is actually lower, the tool tells you it's a decrease instead of showing a confusing negative number.
How to calculate a percentage increase
- 1
Choose the calculation
Increase a number, or find the increase between two numbers.
- 2
Enter your values
A number and a percentage, or old and new values.
- 3
Read the result
New value, amount of change or percentage.
Key features
Both directions
Apply a percentage or measure one.
Multiplier shown
Handy for spreadsheets (× 1.04).
Direction check
Warns if the change is really a decrease.
Instant results
Updates as you type.
Common uses
- Raises: See your new pay after a cost-of-living increase.
- Prices and rent: Work out increases and inflation.
- Business growth: Year-over-year revenue or customer growth.
Tips and good to know
- Percentage increase = (new − old) ÷ old × 100. Always divide by the original value.
- Two increases of 10% add up to 21%, not 20%, because the second applies to the higher amount.
Frequently asked questions
How do I increase a number by a percentage?
Multiply it by (1 + percentage ÷ 100). A $65,000 salary with a 4% raise is 65,000 × 1.04 = $67,600.
How do I calculate the percentage increase between two numbers?
Subtract the old value from the new one, divide by the old value and multiply by 100. From $1,450 to $1,537 is a 6% increase.
What if the new value is smaller?
Then it's a decrease; the calculator shows the size of the drop and labels it.