Introduction
This NPS calculator works out your Net Promoter Score. Just enter how many people gave each rating from 0 to 10, or type in your totals for promoters, passives, and detractors. The tool runs the calculation for you.
NPS comes from one simple survey question: "How likely are you to recommend us to a friend or colleague?" People answer on a 0 to 10 scale.1 Scores of 9 or 10 are promoters.1 Scores of 7 or 8 are passives.1 Scores of 0 to 6 are detractors.1 Your NPS is the percent of promoters minus the percent of detractors.1 The final score falls somewhere between −100 and +100.
Along with your score, you get a full breakdown of each group, a chart of your results, and a step-by-step look at the math. You can also add your population size to see the margin of error, and download the whole thing as an image to share with your team.
How to use our NPS Score Calculator
Enter how many people gave each survey score, and the calculator shows your Net Promoter Score, your promoter, passive and detractor split, a chart, the math steps and your margin of error.
Input Mode: Pick "Per-Score Entry (0–10)" if you know how many people gave each score. Pick "Category Entry" if you already know your promoter, passive and detractor totals. Switching modes sets all counts back to zero.
Responses by Score (0–10): In per-score mode, type the number of people who gave each score from 0 to 10. Use the plus and minus buttons to change a count by one. Scores 0–6 count as detractors, 7–8 as passives, and 9–10 as promoters.
Promoters: In category mode, type how many people scored 9 or 10.
Passives: Type how many people scored 7 or 8.
Detractors: Type how many people scored 0 through 6.
Show decimals: Turn this on to see your NPS with two decimal places instead of a rounded whole number.
Population size: Type the total number of customers you sent the survey to. This number must be equal to or bigger than your total responses. It is used to work out your 95% margin of error.
Calculate: Click this to run the numbers. Results also update as you type.
Reset / Clear All: Click this to clear every field and start over.
Download Results (PNG): Click this to save an image of your NPS score, category breakdown and chart.
What Is a Net Promoter Score (NPS)?
Net Promoter Score, or NPS, is a simple way to measure how much people like your brand. You ask customers one question: "How likely are you to recommend us to a friend or colleague?" They answer with a number from 0 to 10.1 That's it. Those numbers turn into one score that shows if your customers would spread the word about you or warn people away.
The Three Customer Groups
Every answer falls into one of three groups:
- Promoters (9–10): Happy fans. They buy again and tell others about you.1
- Passives (7–8): They are fine with you, but not excited. A better deal could pull them away.1
- Detractors (0–6): Unhappy customers. They may leave bad reviews and hurt your name.1
How the NPS Formula Works
The math is easy. Find the percent of Promoters, find the percent of Detractors, and subtract:
NPS = % Promoters − % Detractors
Passives count in the total number of people, but they are not added or subtracted. Because of that, your score can land anywhere from −100 (everyone is a Detractor) to +100 (everyone is a Promoter). The answer is a plain number, not a percent.
Example: 100 people answer. 60 are Promoters, 20 are Passives, 20 are Detractors. That is 60% − 20% = an NPS of 40.
What Counts as a Good Score
- Below 0: Needs attention. More people are unhappy than happy.
- 0 to 29: Good. You have room to grow.
- 30 to 69: Great. Most customers are on your side.
- 70 and up: Excellent. Very few brands reach this.
Scores differ a lot between markets, so a score means most when you compare it with your own earlier surveys.
Why Sample Size Matters
A score built from 15 answers is shaky. A score built from 500 answers is much more solid. The margin of error tells you how far off your score might be. If your NPS is 35 with a margin of error of ±11, your real score is likely somewhere between 24 and 46. More responses shrink that range and make your number more trustworthy.
Why Businesses Track NPS
NPS ties customer feelings to money. Promoters stay longer, spend more, and bring in free referrals, which lowers what you pay to get new customers. You can see that effect directly with the CAC Calculator and the Customer Lifetime Value Calculator. Detractors cancel, ask for refunds, and cost you sales through bad word of mouth. Tracking your score over time shows if changes to your product, price, or support are actually working. One score on its own means little. The trend, month after month, is what tells the real story.