NPS Calculator

What is NPS?

Net Promoter Score, or NPS, is a customer-feedback measure calculated by subtracting the percentage of detractors from the percentage of promoters. This NPS calculator does the arithmetic for you and shows how each response group contributes.

Responses are grouped by rating: promoters give 9–10, passives give 7–8, and detractors give 0–6. Promoters are the customers most likely to recommend your business. Passives are less enthusiastic. Detractors are dissatisfied or less likely to recommend you. NPS uses the share of promoters and detractors; passives affect the group percentages by being part of the total responses, but are not directly subtracted.

Why NPS matters

A score gives you a compact way to track how customers feel about their experience. It can help you decide where to investigate before changing prices, expanding a product, hiring for customer support, or investing in a service improvement. It is a signal to ask better questions, not proof that a particular business decision will increase sales.

The response mix adds useful context. A score can look favorable while a meaningful group of customers still reports a poor experience. Read comments and contact reasons alongside the result. For a small business, recurring complaints about delivery, billing, or onboarding can point to specific process changes. For a larger company, comparing teams or customer groups can show where experiences differ.

NPS is not a measure of revenue, profit, or customer retention. Compare it with your own earlier results and with relevant published industry data, and look for patterns in the feedback. Do not use one score alone to set prices, judge an employee, or make a hiring decision.

How to use this NPS calculator

1. Enter the number of promoter responses in the Promoters (9-10) field.
2. Enter the number of passive responses in the Passives (7-8) field.
3. Enter the number of detractor responses in the Detractors (0-6) field.
4. Check that the counts cover the responses you want to analyze and that each response belongs in the right group. Use the same survey question and audience when comparing results over time.
5. Read the NPS result and the response percentages together. The score is the promoter percentage minus the detractor percentage. Passives are included in the total used to calculate percentages.

NPS calculator example

How to read your NPS result

A positive score means the promoter percentage is greater than the detractor percentage. A negative score means the detractor percentage is greater. A score of zero means the two percentages are equal. The size of the result reflects the gap between those groups, not how many customers responded.

Check the response count before drawing conclusions. A small group of responses may not reflect the experience of your full customer base. The calculator reports the math on the counts you enter; it cannot tell you whether respondents represent all customers or whether people who did not respond feel differently. Keep the survey wording, timing, and audience consistent when comparing results.

How to improve your NPS

1. 01

   Investigate detractor feedback

   Review comments and support records for repeated problems. If customers cite confusing invoices, late delivery, or a difficult setup, assign an owner to fix the process and follow up with affected customers.

2. 02

   Make onboarding easier

   Ask new customers where they got stuck. Rewrite unclear instructions, add a useful setup walkthrough, or have a staff member contact customers who have not completed key steps.

3. 03

   Close the loop

   Respond to customers who share a concern. Acknowledge the issue, explain what you can do next, and record whether the fix worked. Avoid asking for a better rating as a substitute for resolving the problem.

4. 04

   Look for patterns by customer group

   Compare feedback across products, locations, or stages of the customer relationship when you have enough responses to make the comparison useful. Use the findings to prioritize a specific service or product change, then check later feedback.

5. 05

   Protect the quality of the survey

   Use neutral wording and invite feedback from a representative range of customers. If you only ask customers after a successful support interaction, the result may not reflect the broader experience.

Common NPS mistakes

• Treating NPS as a percentage of satisfied customers

  NPS is the promoter percentage minus the detractor percentage. It is not the share of customers who gave a positive rating, and passives do not count as promoters.

• Mixing different surveys

  Changing the question, audience, or point in the customer journey can make comparisons misleading. Note what was asked and who was included each time.

• Acting on the score without reading comments

  The number shows the balance between response groups, but it does not identify the cause. Review written feedback and support themes before choosing a fix.

• Confusing a higher score with business results

  A better NPS does not by itself prove that revenue, retention, or profit improved. Check those outcomes separately before deciding whether a change is paying off.

The NPS formula

Key terms

Net Promoter Score (NPS)

The percentage of promoters minus the percentage of detractors.

Promoters

Respondents who give a rating of 9–10.

Passives

Respondents who give a rating of 7–8.

Detractors

Respondents who give a rating of 0–6.