Percentage Calculator
Percentage change, instantly.
Enter a from-value and a to-value to see the difference and the percentage increase or decrease — in your browser.
Percentage
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Difference
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Change
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Direction
What is the Percentage Calculator?
BYAFT's Percentage Calculator works out the percentage change between two numbers, right in your browser. Enter a starting value and a new value to see the difference and whether it's an increase or decrease — no sign-up, and nothing uploaded.
Use it for price changes, growth, results and any “what percent more/less” question.
How to use the Percentage Calculator
- 1Enter two valuesType the original (from) and new (to) numbers.
- 2Read the changeSee the difference and the percentage change.
- 3Check the directionIt shows increase, decrease or no change.
What you can use it for
- Measuring a price increase or decrease
- Tracking growth between two periods
- Comparing a before and after figure
- Checking a percentage difference quickly
Frequently asked questions
How is percentage change calculated?
It is the difference between the two values divided by the absolute starting value, shown as a percentage.
Is it free?
Yes — the percentage calculator is free with no sign-up.
Is my data uploaded?
No. The calculation runs entirely in your browser.