NPS calculator
Work out your Net Promoter Score
Count how many people scored 9-10, 7-8 and 0-6 on the recommendation question. We give you your NPS instantly, from -100 to +100.
Responses by group
In NPS, people rate the question “would you recommend us?” from 0 to 10. By score they fall into: 9-10 promoters, 7-8 passives, 0-6 detractors. Count how many people landed in each group.
How NPS is calculated
NPS sorts respondents into three groups by their 0-10 score: promoters (9-10), passives (7-8) and detractors (0-6). The formula is simple: percentage of promoters minus percentage of detractors. Passives count toward the base but add nothing either way.
The result runs from -100 (all detractors) to +100 (all promoters). Above 0 you already have more promoters than detractors; from +50 up is considered excellent, though the real bar depends on your industry.
Frequently asked questions
- What is a good NPS?
- Any positive value means more promoters than detractors. As a general reference, above +30 is good and above +50 is excellent, but always compare against your industry average.
- Why don't passives count in the formula?
- NPS measures the balance between enthusiasm and discontent. Passives are satisfied but not committed: they're part of the base the percentages are calculated on, but they don't add to the score.
- How many responses do I need for a reliable NPS?
- The more the better, and treat low counts as directional. Note that NPS combines two groups (promoters and detractors), so its margin of error is wider than a single proportion's: it needs more responses than a simple sample size calculator would suggest. Use that as a floor, not an exact NPS figure.
Where the formula comes from
- Reichheld, F. F. (2003). The One Number You Need to Grow. Harvard Business ReviewThe article that defined the Net Promoter Score and its three 0-10 bands.
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