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Net Promoter Score Calculator

Calculate NPS from promoter, passive and detractor response counts. This free net promoter score calculator shows the calculation and its assumptions so you can compare your own figures.

Calculated on your device

Your results

Net Promoter Score45

Calculate NPS from promoter, passive and detractor response counts.

Responses200

Calculated outcomes

Promoter Percent
60%
Passive Percent
25%
Detractor Percent
15%

Assumptions and estimates

  • Promoters score 9–10, passives 7–8 and detractors 0–6 on a 0–10 recommendation survey. NPS ranges from −100 to 100 and is a score, not a percentage.
  • Method: NPS = 100 × (promoters − detractors) ÷ all responses.
  • NPS is a score from −100 to 100, not a percentage. Survey sampling and non-response affect how representative it is.

Useful next steps

  1. Use Compare options to test an alternative side by side.
  2. Copy, print or download a record of this calculation when you need one.

Reports open your email app addressed to s@s1.ie with the public page address only. Your inputs are never added.

How the net promoter score calculation works

NPS = 100 × (promoters − detractors) ÷ all responses.

NPS is a score from −100 to 100, not a percentage. Survey sampling and non-response affect how representative it is.

Using this calculator

  1. Enter your own figures in the labelled inputs. Keep the currencies, units and time periods consistent.
  2. Choose any applicable rate profile, pattern or assumption shown for this tool. Open additional inputs when relevant.
  3. Review net promoter score and responses, then read the stated assumptions and eligibility conditions before using the result.

Worked example

This is a static example using illustrative inputs, not facts about you or today’s date. The displayed eligibility selections and assumptions apply only to this example.

See example inputs
Promoters: scores 9–10
120
Passives: scores 7–8
50
Detractors: scores 0–6
30
Net Promoter Score
45
Responses
200

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