Calculators
NPS Calculator
Calculate Net Promoter Score from survey responses and see how winning back detractors would change it.
- Runs in your browser
- Nothing uploaded
The tool
Enter your numbers below. Results update as you type, and nothing leaves your browser.
Everything you enter stays on your own machine. Nothing is sent to us or to anyone else, which you can confirm in your browser network tab.
What people use it for
- Scoring a customer survey
- Setting a realistic NPS target
- Showing the impact of a service recovery programme
- Comparing NPS between products or regions
About this tool
What the NPS Calculator does
Net Promoter Score is the percentage of promoters (scores of 9 or 10) minus the percentage of detractors (0 to 6), giving a figure between −100 and +100. This calculator also shows how much the score would move if some detractors became promoters.
It also works as a NPS impact calculator or a net promoter score calculator.
Formula
- NPS = % promoters − % detractors
- Promoters score 9–10, passives 7–8, detractors 0–6
- Each detractor turned promoter adds 2 ÷ responses × 100 points
Worked example
Using the starting values in the calculator above:
| Input | Value |
|---|---|
| Promoters (9–10) | 420 |
| Passives (7–8) | 330 |
| Detractors (0–6) | 250 |
| Detractors won over to promoters | 50 |
| Result | Value |
|---|---|
| Net Promoter Score | 17.0 |
| NPS after winning detractors over | 27.0 |
| Promoters | 42.0% |
| Detractors | 25.0% |
| Responses | 1,000 |
How to read the result
Passives do not change the score directly, but they dilute both percentages. Turning a detractor into a promoter moves NPS twice as far as either change on its own.
NPS is most useful as a trend with follow-up questions. The reasons detractors give are usually worth more than the score itself.
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Questions
Questions about this tool
The things clients actually want to know — costs, timelines, ownership and what happens after launch.
Subtract the percentage of detractors (scores 0 to 6) from the percentage of promoters (scores 9 and 10). Passives count only in the total.
Any score above zero means more promoters than detractors. Scores vary widely by industry, so compare with your own history and close competitors.
More is better. With fewer than about 100 responses, the score can move several points from chance alone.
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