Free tool

NPS calculator for your Net Promoter Score survey

This NPS calculator works out your Net Promoter Score from survey answers. Enter how many promoters, passives and detractors you have, or paste raw 0–10 scores.

Question: “How likely is it that you would recommend [company or product] to a friend or colleague?” on a 0–10 scale.

How do you calculate NPS?

NPS is the percentage of promoters minus the percentage of detractors, from answers to one 0–10 question about how likely people are to recommend you. Scores of 9 or 10 are promoters, 7 or 8 are passives, and 0 to 6 are detractors. Passives count toward the total but not toward the score.

For example, 50 promoters, 30 passives and 20 detractors out of 100 answers give 50% − 20% = an NPS of 30. The score runs from −100, when everyone is a detractor, to +100, when everyone is a promoter.

What does an NPS score tell a product team?

An NPS score tells you whether more people would recommend your product than would warn others off it, but not why. A positive score means promoters outnumber detractors. Pair the score with an open follow-up question such as "What is the main reason for your score?" and with usability testing, so you know which part of the experience to fix.

Compare your NPS with your own earlier results, measured the same way, rather than with published averages from other industries.

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FAQ

NPS calculator FAQs

Straight answers about the tool and the method behind it.

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What is the NPS formula?
NPS = % promoters − % detractors. Promoters answer 9 or 10, passives 7 or 8 and detractors 0 to 6 on the question "How likely is it that you would recommend [company or product] to a friend or colleague?"
Can NPS be negative?
Yes. When detractors outnumber promoters the score is below zero. The lowest possible score is −100 and the highest is +100.
Is NPS a percentage?
No. NPS is the difference between two percentages, so it is reported as a whole number between −100 and +100, not with a % sign.
How many responses do I need for a reliable NPS?
More responses make the score steadier. With only a handful of answers, one person changes the score a lot, so track it over time and read the open-ended reasons alongside the number.