Percentage Increase Calculator
How much something went up, and the multiplier behind it.
Work out Percentage Increase. How much something went up, and the multiplier behind it. Shows the working, not just the answer.
Percentage increase
50.00%
100 → 150, a increase
Percentage changes do not reverse symmetrically. This increase of 50.00% would need 33.33% in the opposite direction to undo — a 50% fall famously needs a 100% rise to recover. Multiplying by 1.5 is the same operation stated without that trap.
How the Percentage Increase Calculator works
The size of an increase as a percentage of where it started. The multiplier alongside is the same fact stated without the trap: a 50% increase is a multiplier of 1.5, and stacking two of them gives 2.25 rather than 2.
Also known as: percent increase formula · how to calculate percentage increase · add a percentage to a number · price increase calculator
Frequently asked questions
How do I calculate a percentage increase?
Divide the increase by the original value and multiply by 100. From 100 to 150 is a 50% increase.
How do I add a percentage to a number?
Multiply by 1 plus the percentage as a decimal. Adding 50% means multiplying by 1.5.
Do two 50% increases make 100%?
No — they make 125%. Each applies to the result of the last, so 1.5 × 1.5 is 2.25, not 2.
How do I reverse a percentage increase?
Divide by the multiplier, not by subtracting the same percentage. Undoing a 50% rise means dividing by 1.5, which is a 33.3% fall.
Put this calculator on your own site
Free to use, on any site, commercial or not. Paste this where you want it to appear. It is a plain iframe, so it works in WordPress, Squarespace, Wix, Webflow, Ghost and anything else that accepts HTML.
<iframe src="https://www.thecalclibrary.com/embed/percentage-increase-calculator" width="100%" height="640" style="border:1px solid #e2e8f0;border-radius:12px" loading="lazy" title="Percentage Increase Calculator"></iframe>The only condition is that the credit line stays visible. It sits inside the frame, so you do not have to do anything to keep it.
Related calculators
Percentage Decrease Calculator
How much something fell, and what it takes to recover.
OpenPercentage Change Calculator
Change, and the reverse move needed to undo it.
OpenExponential Growth Calculator
Growth or decay, with doubling time and half-life.
Open