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How to Calculate NPS: A Step-by-Step Guide

09/05/2025, by Zykrr

How to Calculate NPS: A Step-by-Step Guide

Introduction

Net Promoter Score (NPS) is one of the most widely used metrics to assess customer loyalty. But how exactly is it calculated, and why does it matter?

In this guide, we’ll cover:

What is NPS?

Net Promoter Score (NPS) measures customer loyalty by asking a simple question:

“On a scale of 0 to 10, how likely are you to recommend [Company/Product] to a friend or colleague?”

Based on the response, customers are categorized as:

Flowchart illustrating NPS survey process and categorization of responses

How to Calculate NPS: The Formula

The NPS formula is straightforward:

NPS = % of Promoters – % of Detractors

Step 1: Collect Responses
Step 2: Calculate the Percentage of Promoters

Example:

Step 3: Calculate the Percentage of Detractors

Example:

Step 4: Apply the NPS Formula

NPS = 40% – 20% = 20

In this example, the NPS score is 20, indicating a moderately positive score.

Illustration of NPS formula: Promoters % - Detractors % = NPS score.
Step 5: Interpret the NPS Score

Example: NPS Calculation in Banking

A retail bank in India conducted an NPS survey with 500 customers:

NPS = 50%-20 % = 30 (a positive but average score in banking)

Common Pitfalls in NPS Calculation

  1. 1. Not Including All Responses: Ensure all customer feedback is categorized appropriately.
    2. Misclassifying Scores: Only 9–10 are Promoters, not 7–8.
  2. 3. Ignoring Passives: While they don’t impact the NPS calculation, passives should still be addressed to convert them into promoters.

How Zykrr Helps You Measure NPS

Zykrr’s CXM platform includes:

Ready to simplify your NPS tracking? Request a demo with Zykrr

Frequently
Asked Questions

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    How often should we measure NPS?

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    NPS can be measured quarterly to track overall customer loyalty and after key interactions like onboarding or support calls.

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    Can NPS be calculated for individual products?

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    Yes, you can calculate NPS for specific products or services to identify areas of strength and weakness.

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    How accurate is NPS as a loyalty metric?

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    While NPS is a reliable indicator of overall loyalty, it should be paired with other metrics like CSAT and CES for a complete customer view.

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    What is a good NPS score in retail?

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    A score of 50+ is considered excellent in retail, indicating high customer advocacy.

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