⭐NPS Calculator

About this tool

Enter the number of promoters (9–10), passives (7–8) and detractors (0–6), or paste the raw scores from your survey export. You get the NPS, a coloured breakdown bar, the margin of error at 95% confidence and, for pasted scores, a histogram of every score from 0 to 10.

Reading an NPS honestly

Net Promoter Score comes from one question — how likely are you to recommend us to a friend or colleague, on a 0–10 scale — and is the percentage of promoters minus the percentage of detractors, so it ranges from −100 to +100. Passives count in the total but not the score. Its popularity comes from simplicity, and its biggest misuse is reading noise as change: the score is a difference of two proportions, so its margin of error is wider than people expect. With 200 responses an NPS of 30 is roughly 30 ± 11, so a five-point move from one month to the next usually means nothing; the calculator shows the margin so you can tell. Benchmarks vary enormously by industry and region, which makes your own trend, and the comments people leave, more useful than a comparison table. The sample size calculator tells you how many responses you need, the A/B test calculator compares two groups, the SaaS metrics calculator shows the churn a score should predict, and How A/B testing works — and the three ways it lies explains significance.

Frequently asked questions