Percentage Increase Calculator
Calculate growth in percent: enter the original value and the new, higher value.
About this tool
A percentage increase expresses growth relative to where you started: (new − old) ÷ |old| × 100 — dividing by the magnitude of the original value. It is the number behind pay rises (“a 6% increase”), price rises, audience growth and investment returns — and it is always relative to the original, which is why small bases produce dramatic percentages.
Enter the old value and the new value; the calculator returns the increase as a percentage and states the raw difference alongside, so a “50% increase” on a base of 4 (now 6) never masquerades as a big absolute change.
How to use it
- Enter the original value in “From”.
- Enter the new value in “To”.
- The result is the percentage increase (a negative result means the value actually decreased).
Frequently asked questions
How is percent change calculated?
Percent change = (new − old) ÷ |old| × 100. Dividing by the original value is what makes it a relative change: going from 80 to 100 is +25%, and going back from 100 to 80 is −20% — the two directions are not mirror images.
What is a 100% increase?
Doubling. A 100% increase means the value grew by its own amount: 50 → 100. A 200% increase is tripling (50 → 150).
How do I calculate a pay rise in percent?
Divide the raise by your old salary and multiply by 100: a $3,000 rise on $50,000 is 6% — or just enter 50000 and 53000 above.