Percentage Change Calculator
Calculate percentage increase or decrease between two values, or work backwards to find the original value before a percentage change was applied.
Percentage Change Explained
The Formula
% Change = ((New Value − Original Value) ÷ Original Value) × 100. Positive result = increase. Negative result = decrease.
Common Applications
Price inflation, salary increases, investment returns, population growth, test score changes, statistical comparisons. Any time you want to know 'how much has this changed relatively?'
Percentage Points vs Percentage Change
If a tax rate rises from 20% to 25%, that's a 5 percentage point increase but a 25% change. These are different and frequently confused — always specify which you mean in formal contexts.
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