Percentage change calculator UK
Measure an increase or decrease between an original and a new value. Check the formula, worked example and limits before using your own figures.
Enter your figures
Percentage change
Inputs changed. Select Calculate result to update your estimate.
Use your actual figures. Any prefilled price, fee, rate or return is an editable illustration, not a current product quote. The original value must be positive. A percentage point change between two rates is a different calculation.
How the percentage change calculator uk works
Percentage change = (new − original) ÷ original × 100.
Data basis: mathematical formula using your inputs. Example prices and rates are illustrative, not current market quotes.
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Worked example: percentage change
This illustration uses the calculator’s example inputs. It is not a quote or a recommended financial decision.
- Original value
- 100
- New value
- 120
Percentage change: 20%
Percentage change = (new − original) ÷ original × 100.
Percentage change: questions answered
What does the percentage change calculation include?
Percentage change = (new − original) ÷ original × 100. Use your actual figures. Any prefilled price, fee, rate or return is an editable illustration, not a current product quote. The original value must be positive. A percentage point change between two rates is a different calculation.
Using your result
Example inputs are a starting point. Replace them with your figures and select Calculate result. Results are rounded for display; calculations use unrounded values.
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