NPS Calculator (Net Promoter Score)

Calculate your Net Promoter Score from the number of promoters, passives and detractors

Last updated: 10/27/2026

This NPS calculator turns your survey counts into a Net Promoter Score. NPS comes from one question: "How likely are you to recommend us to a friend or colleague?", answered on a 0 to 10 scale. Enter how many people gave each type of answer and the calculator shows the score, from -100 to +100, and the share of each group.

Calculator Inputs

Promoters (9-10)*

Number of people who answered 9 or 10

Passives (7-8)*

Number of people who answered 7 or 8

Detractors (0-6)*

Number of people who answered 0 to 6

Results

Enter values above to see your results

How to use this calculator

Count your answers in three groups: 9 or 10 are promoters, 7 or 8 are passives, and 0 to 6 are detractors.
Enter the three counts. You can use raw counts or percentages, as long as all three use the same kind of number.
Read the NPS and the breakdown. The score is rounded to a whole number, which is how NPS is usually reported.

How the calculation works

NPS = % promoters − % detractors.

Each percentage is that group divided by all responses, passives included. Passives do not add to or subtract from the score, but they count in the total, so more passives pull both percentages toward zero.

The result is a number, not a percentage. 100 means every answer was a 9 or 10, and -100 means every answer was 6 or lower.

How to calculate NPS from raw 0 to 10 scores

If your survey tool exports one score per person, sort the scores into the three groups first, then enter the counts here.

9 and 10: promoters
7 and 8: passives
0 to 6: detractors
Leave out blank or skipped answers, because they are not part of the total.

Worked example

Default values: 60 promoters, 30 passives, 10 detractors

Total responses:60 + 30 + 10= 100

% promoters:60 / 100 × 100= 60%

% detractors:10 / 100 × 100= 10%

NPS:60 − 10= 50

120 responses: 45 promoters, 40 passives, 35 detractors

Total responses:45 + 40 + 35= 120

% promoters:45 / 120 × 100= 37.5%

% detractors:35 / 120 × 100= 29.2%

NPS:37.5 − 29.17 = 8.33, rounded= 8

Tips & Best Practices

•Scores range from -100 to +100. A positive score means you have more promoters than detractors.
•Typical scores differ a lot between industries, so compare first with your own earlier surveys that asked the same question.
•The labels under the result (Excellent above 50, Good above 0) are this calculator's rough guide, not an official scale.

Frequently Asked Questions

How do you calculate NPS?

Subtract the percentage of detractors (scores 0 to 6) from the percentage of promoters (scores 9 and 10). Both percentages use all responses as the base, including passives.

Can NPS be negative?

Yes. If more people answer 0 to 6 than 9 or 10, the score is below zero. The lowest possible score is -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%.

Why are Passives ignored?

Passives are satisfied but unenthusiastic customers who are vulnerable to competitive offerings. They do not add to or subtract from the score, but they still count in the total number of responses.

How many responses do I need?

There is no fixed minimum, but small samples move a lot. With 20 responses, one person changing from passive to detractor lowers the score by 5 points, because each person is 5% of the total.