What is the formula for calculating NPS?

The Net Promoter Score (NPS) is calculated by subtracting the percentage of Detractors from the percentage of Promoters. The result is an integer ranging from -100 to +100.

Who are Promoters, Passives, and Detractors?

Promoters are customers who give a score of 9-10. Passives score 7-8. Detractors are those who give a score of 0-6.

What is considered a good NPS score?

Generally, a score above 0 is considered 'good', above 50 is 'excellent', and above 70 is 'world-class'. However, benchmarks vary significantly by industry.

Why are Passives excluded from the final NPS calculation?

Passives are included in the total response count (the denominator), which dilutes the percentage of Promoters and Detractors, but they do not directly add to or subtract from the final integer score.

Is my survey data saved when using this calculator?

No. This tool operates entirely on the client side. Your data remains in your browser and is never transmitted to a server.

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Net Promoter Score Calculator – Track Loyalty | Sapacalc

Net Promoter Score Calculator

The Net Promoter Score calculator gives you a single loyalty number between -100 and +100 by subtracting your percentage of Detractors from your percentage of Promoters — built for business owners and customer success teams who want a fast read on how customers feel. Use it alongside the Customer Lifetime Value Calculator to connect your loyalty score directly to revenue impact.

Promoters (Score 9-10)

Highly satisfied, loyal enthusiasts.

Passives (Score 7-8)

Satisfied but unenthusiastic customers.

Detractors (Score 0-6)

Unhappy customers who can damage your brand.

Net Promoter Score

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Total Responses 0

Promoter % 0%

Detractor % 0%

Sentiment Distribution

What Net Promoter Score Actually Means

NPS splits every survey respondent into one of three groups based on a single 0–10 question: “How likely are you to recommend us?” Scores of 9 and 10 are Promoters, 7 and 8 are Passives, and 0 through 6 are Detractors. According to Bain & Company, businesses with an NPS 10 points above their industry average grow revenue at more than twice the rate of competitors.

Your NPS score predicts behavior, not just sentiment. A Promoter refers an average of 3 new customers per year at zero acquisition cost. A Detractor tells 9 to 15 people about a bad experience — negative word of mouth that compounds quietly while your top-line numbers still look fine.

How to Calculate Net Promoter Score in 4 Steps

Send your survey and collect all responses. Ask every customer the standard 0–10 recommendation question. Most businesses survey a random 10%–20% sample of active customers and need at least 50 responses before the result is worth acting on.
Sort respondents into three groups using the NPS formula groupings. Scores of 9 and 10 are Promoters. Scores of 7 and 8 are Passives. Scores of 0 through 6 are Detractors. Passives are excluded from the calculation entirely — do not include them in either group.
Calculate the percentage of Promoters and Detractors separately. Divide each group by total respondents and multiply by 100. On 200 responses with 90 Promoters and 40 Detractors: Promoters = 45%, Detractors = 20%.
Subtract Detractor percentage from Promoter percentage. Using the numbers above: 45 − 20 = an NPS of 25. The score ranges from -100 to +100. Anything above 0 means more customers would recommend you than would warn others away.

What Your Net Promoter Score Result Means

Result Range: Below 0 Detractors outnumber Promoters. Negative word of mouth is actively spreading — contact your most recent Detractors within 48 hours before the damage compounds further.

Result Range: 0 to 30 Your score is positive but has significant room to improve. Investigate which customer segment is pulling the number down — a score of 20 overall can hide a -15 among one key group.

Result Range: Above 50 Excellent in most industries. Activate your Promoters through a referral program — a 10% increase in referral activity at this score level typically reduces acquisition cost by 15% to 25%.

Common Mistakes People Make with Net Promoter Score

The most expensive mistake is including Passive scores (7–8) in the calculation. Passives are excluded on purpose — counting them inflates your result by 5 to 15 points and makes a mediocre score look competitive when it is not.

The second mistake is running NPS once a year. Sentiment can shift within weeks of a price increase or product change. Businesses that survey quarterly catch score drops within 45 to 60 days — annual surveys often find the cause months after the damage is already done.

The third mistake is treating NPS as an internal report instead of an action trigger. Following up with every Detractor within 5 business days converts 15% to 25% of them into Passives — a measurable gain that costs nothing beyond staff time.

The fourth mistake is comparing against a universal benchmark. A score of 30 is weak for a software company but strong for an airline. Industry context determines whether your number signals a problem or a strength. For more information about keeping the customers you already have, visit the Retention Rate Calculator.

Net Promoter Score: Frequently Asked Questions

Q: What is a good NPS score? A: It depends on your industry. Technology companies average 35 to 45. Retail averages 25 to 35. Financial services average 15 to 25. Always compare your NPS score to published benchmarks for your specific sector rather than a universal number.

Q: How many survey responses do I need? A: A minimum of 50 responses gives you a result worth acting on. Below 50, a single unhappy customer can shift your NPS by 5 to 10 points — too much noise to distinguish a real pattern from random variation.

Q: How does NPS connect to customer churn? A: Detractors churn at roughly 3 to 5 times the rate of Promoters over a 12-month period. If your NPS is falling while total customers hold steady, churn is likely accelerating beneath the surface. Use the Churn Rate Calculator to measure your actual monthly churn and compare it against the Detractor percentage in your latest survey.

Q: How often should I run an NPS survey? A: Quarterly is the standard cadence for subscription businesses. E-commerce and retail often use triggered surveys sent 3 to 5 days after each purchase — producing a continuous real-time score rather than a periodic snapshot.

Tips to Improve Your Net Promoter Score

Run the NPS calculator above immediately after your next survey closes — even 50 responses give you more to act on than waiting for a larger sample that may never arrive.
Counter-intuitively, focus on converting Passives before deepening relationships with Promoters — moving a 7 to a 9 adds more to your score than working harder on a customer already scoring 10.
Call every Detractor personally within 5 business days — a direct conversation converts 15% to 25% of them and is the single fastest way to move your NPS upward.
Add one open-ended follow-up question to every survey — “What is the main reason for your score?” turns a number into actionable feedback at no extra cost.
Segment your NPS by customer type, plan tier, and acquisition channel — an aggregate score of 28 can hide a 55 among your best customers and a -12 among trial users, each requiring a completely different response.