NPS calculator and comparison
Calculate a Net Promoter Score with an approximate interval, or compare two independent NPS scores with a two-sided test. The calculation runs in your browser; your inputs stay on this device.
NPS calculator
Use 0–6 as detractors, 7–8 as passives and 9–10 as promoters. NPS = % promoters − % detractors.
Compare two NPS scores
Approximate independent-group comparison using a normal approximation and unadjusted two-sided test.
Formula and assumptions
NPS = 100 × (promoters − detractors) ÷ total valid responses. The two-group comparison uses the estimated variance of each −1/0/+1 response and an unadjusted normal approximation for the independent difference.
These estimates assume independent observations and simple random samples where applicable. They do not adjust for complex designs, weighting, clustering or multiple comparisons. Read the result with the underlying study design in mind.
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Frequently asked questions
Are my inputs sent to PulseLake?
No. The calculation runs in your browser; the form does not submit the values, and these calculators do not use a server-side analysis service.
Do these results handle weighting or complex survey samples?
No. The methods assume independent simple random observations and do not account for weighting, clustering, repeated measures or nonresponse.
Does statistical significance establish practical importance?
No. Review the interval and whether effects of that size matter for the decision. A non-significant result does not prove groups are identical.
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