What is Net Promoter Score?
Net Promoter Score (NPS) is a customer loyalty metric based on one question: how likely are you to recommend this company to a friend or colleague? Respondents are grouped into promoters (9-10), passives (7-8), and detractors (0-6). The score ranges from -100 to +100.
NPS complements retention metrics such as the churn rate calculator. Churn tracks who leaves, while NPS captures willingness to recommend, which often predicts future growth and word-of-mouth referrals.
NPS formula
Passives are counted in the total response base but excluded from the NPS calculation. You first convert each segment to a percentage of total responses, then subtract the detractor share from the promoter share.
Worked example
From 100 survey responses, 60 are promoters, 30 are passives, and 10 are detractors. Promoters represent 60% and detractors 10%. NPS equals 60% - 10%, or 50. Passives do not affect the score.
How to interpret NPS
- Below 0: More detractors than promoters. Customer experience needs improvement.
- 0 to 30: Solid but room to grow promoter share.
- 30 to 70: Strong loyalty and referral potential.
- Above 70: Exceptional, often seen at category-leading brands.
Counts vs. percentages
Use response counts when you have raw survey data. Use percentage mode when you already know segment shares. If percentages do not sum to exactly 100%, this calculator normalizes them proportionally before computing NPS.
Frequently asked questions
Why are passives excluded from NPS?
What is a good NPS score?
How many responses do I need?
Can NPS be above 100?
How often should I measure NPS?
Resources and references
The formulas and methods in this calculator were checked against these independent sources.