1
Collect Responses
Ask the standard NPS question, "How likely are you to recommend us?", on a 0–10 scale.
Free Net Promoter Score Calculator with Confidence Intervals
Calculate NPS score from raw survey responses and get statistically sound 95% and 99% confidence intervals, not the misleading margins most calculators give.
No account required. Use this NPS calculator online — your data never leaves your browser.
How to Calculate NPS Score
2
Enter or Upload
Type your promoter, passive and detractor counts, or upload a CSV of raw 0–10 ratings to calculate NPS in seconds.
3
Read with Confidence
Get your score, the mix behind it, and 95% and 99% confidence intervals from benchmarked statistical methods.
Why This NPS Tool?
A net promoter score calculator built on benchmarked interval methods (adjusted Wald and score inversion), not naive formulas that produce statistically weak results.
See the mix behind the number, differentiating when the same NPS shows different detractor shares
95% and 99% confidence intervals always shown together
Honest with small samples: this NPS tool shows wide intervals instead of false precision
Calculate Net Promoter Score with Your Own Surveys
Votito makes it easy to create and distribute NPS surveys, then calculate net promoter score automatically as responses arrive, with confidence intervals included.
Ready-made NPS template Shareable survey links Automatic scoring Live response tracking
Create New NPS SurveyFree NPS Calculator
Enter how many respondents fall into each category. Ratings of 9–10 are promoters, 7–8 are passives, 0–6 are detractors.
BackEnter Your Counts
Counts must be whole numbers. Zero is fine — you need at least one response in total.
NPS Score
Results · step 3 of 3
Composition — the mix behind the number
Confidence intervals
−100 −50 0 50 100
99% interval 95% interval adjusted center headline score
Run Your Own NPS Surveys
Create NPS surveys and track your score with confidence intervals using Votito's survey platform.
Create New NPS Survey