Customer service
40 Customer Feedback Survey Questions (By Goal)
40 customer feedback survey questions grouped by goal, plus rules for writing unbiased questions, choosing scales and keeping surveys short enough to finish.
NPS Calculator (Net Promoter Score)
Get your NPS in seconds, either from the three group counts or by pasting raw 0–10 answers straight from your survey export.
Input method
Net Promoter Score+47.5
The scale runs from −100 (everyone is a detractor) to +100 (everyone is a promoter).
Promoters 60.0%Passives 27.5%Detractors 12.5%
- Responses
- 200
- Margin of error (95%)
- ± 9.8
With this many responses, the true score is likely between +38 and +57.
Runs entirely in your browser. No data is sent to a server.
How it works
- Choose whether you want to enter counts or paste individual scores.
- Enter the number of promoters (9–10), passives (7–8) and detractors (0–6), or paste the 0–10 answers.
- Read your NPS, the share of each group and the margin of error for your sample size.
- In paste mode, check the score distribution to see where answers cluster.
FAQ
How is NPS calculated?
NPS = % promoters (scores 9–10) − % detractors (scores 0–6). Passives (7–8) count toward the total but not toward either group. The result ranges from −100 to +100.
Is NPS a percentage?
No. It is the difference between two percentages, so it is reported as a plain number such as +32, not 32 %.
How many responses do I need for a reliable NPS?
There is no magic number, but the margin of error shrinks as responses grow. With a few dozen answers it is often ±15 points or more, so compare trends over time rather than reading too much into small changes.
How is the margin of error calculated?
The calculator uses the standard approximation for a difference of proportions: 1.96 × √((p + d − (p − d)²) ÷ n) × 100, where p and d are the promoter and detractor shares and n the number of responses.