Percentage Increase Calculator
Calculate a value after a percentage increase, or find what percentage increase goes from one value to another. Two-way calculation with formula
How to Calculate Percentage Increase
Formula: ((New - Original) / Original) × 100. So if a price went from £20 to £25, the increase is ((25-20)/20) × 100 = 25%. The result is always positive when the new value is higher than the original; if it's lower, you have a percentage decrease (negative increase).
Used to express growth rates: salary increases, stock returns, sales growth, population changes, inflation rates. A salary going from £40,000 to £44,000 is a 10% increase. House prices rising from £300k to £360k = 20% increase. Note: percentage increases compound when applied repeatedly - 2 consecutive 10% increases produce 21% total, not 20%.
Common Percentage Increases
| From | To | % Increase |
|---|---|---|
| 100 | 110 | 10% |
| 100 | 125 | 25% |
| 100 | 150 | 50% |
| 100 | 200 | 100% |
| 50 | 60 | 20% |
| 80 | 100 | 25% |
| £40,000 | £44,000 | 10% |
| £300,000 | £360,000 | 20% |
Frequently Asked Questions
How do I express going from 50 to 75?
((75-50)/50) × 100 = 50%. So 75 is 50% more than 50. Common confusion: 'is 75 50% more than 50, or 150% of 50?' Both true - 75 IS 150% of 50, AND it's 50% MORE than 50. The 'increase' framing always uses the difference relative to the starting value.
Are 100% increase and doubling the same?
Yes - 100% increase = doubling. £100 + 100% increase = £200. £100 + 200% increase = £300 (tripled). The terminology can confuse newcomers; 'double' (×2) and 'triple' (×3) avoid the percentage ambiguity.
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