Percent Increase / Decrease Calculator
Solve for initial value, final value, percent change, and difference with stable synced logic.
Inputs
Increase or decrease?
Enter any two values. Best combinations: Initial + Final, Initial + Percent, Final + Percent, Initial + Difference, or Final + Difference.
Results
Direction
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Percent change
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Difference
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Multiplier
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Step-by-step derivation
Enter any two fields, then click Calculate.
References
- Difference = Final − Initial
- Percent change = (Difference ÷ Initial) × 100
- Final = Initial × (1 ± p/100)
- Initial = Final ÷ (1 ± p/100)
Use this Percentage Increase Calculator to find percentage increase or decrease, numeric difference, initial value, or final value. Enter any two supported values to calculate the others.
Calculation Method
Difference = final value − initial value
Percentage change = (difference ÷ initial value) × 100
For an increase:
Final value = initial value × (1 + percentage ÷ 100)
For a decrease:
Final value = initial value × (1 − percentage ÷ 100)
Example
If a value increases from 100 to 125:
Difference = 125 − 100 = 25
Percentage increase = 25 ÷ 100 × 100 = 25%
Important Note
Percentage change is measured relative to the initial value. The standard percentage-change calculation is undefined when the initial value is zero.