NPS Calculator
Calculate Net Promoter Score online for free from promoter, passive and detractor counts - percentage breakdown, quality band and 95% margin of error, all computed in your browser.
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What is NPS Calculator?
The NPS Calculator turns survey response counts into a Net Promoter Score directly in your browser. Enter promoter, passive and detractor counts to get the score on a -100 to +100 scale, the percentage breakdown of each group, a 95% confidence margin of error via the delta method, and a quality band from needs improvement to excellent.
Key Benefits
- A score with statistical context, not just a number
- Percentage breakdown of all three respondent groups
- Margin of error shows how reliable the score is
- Quality bands benchmark the result at a glance
- Private and instant - everything runs in the browser
Common Use Cases
- •Reviewing quarterly customer satisfaction surveys
- •Comparing NPS across product lines or regions
- •Teaching teams how NPS and its margin work
- •Checking whether a survey has enough responses to trust
How to Calculate Your Net Promoter Score
- Tally the responses: Count how many respondents scored 9-10, 7-8, and 0-6.
- Enter the counts: Fill in the promoter, passive and detractor counts from your survey.
- Read the NPS: See the score on the -100 to +100 scale, the group percentages, and the quality band.
- Check the margin: Use the margin of error to judge how reliable the score is for your sample size.
Key Features
- Standard NPS formula on a -100 to +100 scale
- Percentage breakdown of promoters, passives and detractors
- 95% confidence margin of error via the delta method
- Quality band from needs improvement to excellent
- Clear validation for empty or invalid counts
- Instant updates, fully client-side, no upload