Percentage Change Calculator

Calculator Tools

Percentage increase or decrease

FreePrivateInstant
Old value
New value
Full guide, 3 min readUp 50 percent, down 50 percent, and you are not back to zeroRead the story behind this tool →
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Height
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The tool runs inside your visitor's browser, nothing is uploaded, and a small "Powered by ToolCloak" line stays under it. The second line (script) is optional: it makes the frame fit the tool's height.

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History

All history →

Percentage Change Calculator — at a glance

Find out by what percent something went up or down.

Input
Old 80
New 100
Run
Result
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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Step-Up SIP CalculatorStep-up SIP: raise your SIP 10 percent a year and almost double the result