Percentage Change Calculator
Calculator ToolsPercentage increase or decrease
FreePrivateInstant
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History
All history →Percentage Change Calculator — at a glance
Find out by what percent something went up or down.
Old 80
New 100
Run
Increase 25.00%
How to use it — step by step
The starting (old) value and the final (new) value.
1
Enter your values
Fill in the boxes. Sensible example values are already filled in for you.
2
Calculate Change
Press the button. The answer is worked out instantly on your device.
3
Read or copy the result
See the big answer and the extra details, then press Copy to keep them.
Pro tips
Small things that make the result better.
✦Formula: (new − old) ÷ old × 100.
✦A fall from 100 to 50 is −50%, but rising from 50 back to 100 is +100%.
✦The old value cannot be zero.
Quick facts
Up or downshown clearly
Differencealso shown
Decimalssupported
Freeno signup
Frequently Asked Questions
Percentage change vs percentage point?+
Percent change compares the new value to the old one. Percentage points are a simple subtraction between two percentages.
Can I use negative numbers?+
Yes, but results are easiest to read with positive values.
Is my data safe?+
Yes. Everything runs inside your own browser. Your text, files and images are never uploaded to any server.
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