NPS Calculator
Enter how many respondents fell into each group and get your NPS instantly. Unlike most calculators, this one also shows the confidence interval — which is usually the difference between a real change and noise.
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NPS from 100 responses. Great.
How NPS is calculated
Respondents rate 0–10. Scores of 9–10 are promoters, 7–8 are passives, and 0–6 are detractors.
NPS = % promoters − % detractors, reported as a whole number from −100 to +100. It is not a percentage, so write it as 40, not 40%.
The mistake worth avoiding: passives are excluded from the numerator but stay in the denominator. Dropping them entirely inflates your score.
Questions people ask
What is a good NPS?
Anything above 0 means more promoters than detractors. Above 30 is generally considered good and above 50 excellent, but benchmarks vary enormously by industry — comparing your score to your own previous score is more useful than comparing it to a published average.
How many responses do I need for a reliable NPS?
More than most people collect. At 50 responses the 95% confidence interval is roughly ±20 points, so a move from 30 to 40 tells you nothing. This calculator shows the interval so you can see when a change is real.
Do passives count?
They count toward the total but add nothing to the score. That's deliberate: a passive is someone who wouldn't recommend you but wouldn't warn people off either.
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