Percentage Change Calculator
Find the percentage increase or decrease between an old value and a new value. Useful for prices, wages, traffic and results. A negative answer…
8 of 8 free uses remaining today
Find the percentage increase or decrease between an old value and a new value. Useful for prices, wages, traffic and results. A negative answer means the value went down.
Worked example
Example calculated from the starting values. Enter your own values and press Calculate to get your result.
With the default inputs (old value = 80, new value = 100), the results are: percentage change 25.00 %; difference 20.
Quick reference: old value vs result
Reference table based on the example values; it is not your calculation result.
| Old value | Percentage change | Difference |
|---|---|---|
| 40 | 150.00 % | 60 |
| 80 | 25.00 % | 20 |
| 160 | -37.50 % | -60 |
| 400 | -75.00 % | -300 |
| 800 | -87.50 % | -700 |
| 1,600 | -93.75 % | -1,500 |
Frequently asked questions
What formula does this calculator use?
Percentage change = (to-from) ÷ from × 100; Difference = to-from. Variables: from = old value, to = new value.
What do I need to enter?
You need old value, new value. Results update as you type.
What is an example result?
With the default inputs (old value = 80, new value = 100), the results are: percentage change 25.00 %; difference 20.
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