Percentage Increase Calculator
Calculate percentage increase from old and new values, add a percent increase to a number, or reverse an increased value back to the original. Includes growth factor, difference, formula steps, history, examples, and SEO-friendly learning content.
Percentage increase is always measured relative to the original value.
How to calculate percentage increase
Percentage increase shows how much a value has grown compared with its original value. The standard method is to subtract the old value from the new value, divide that difference by the old value, and multiply by 100.
Apply increase: New value = Original × (1 + Percent ÷ 100)
Reverse increase: Original = Final ÷ (1 + Percent ÷ 100)
Example
If a value grows from 100 to 125, the difference is 25. Divide 25 by the original 100, then multiply by 100. The percentage increase is 25%.
Important: Percentage increase is based on the original value, not the final value. That is why increasing 100 to 125 is 25%, but decreasing 125 back to 100 is 20%.
When to use this calculator
- Shopping and pricing: Find how much a price increased.
- Salary and income: Compare old and new pay rates.
- Business growth: Measure revenue, traffic, sales, or profit growth.
- School math: Practice percentage increase formulas with step-by-step output.
- Reverse calculations: Find the original value before a known increase.
Percentage increase chart
| Original | Increase | New value | Growth factor |
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