Calculate. Understand. Decide with confidence.
Free tools and short guides that turn responses into clear next steps.
A number is only the beginning
All tools
14 results found
NPS calculator
Enter the responses in each group and see the balance between promoters and detractors.
CSAT calculator
Enter the number of responses classified as satisfied and the total valid responses.
Guided survey builder
Define the goal, audience, and moment to build a short survey that is easy to answer.
Sample size calculator
Find how many responses you need to represent a population at your chosen precision.
Margin of error calculator
See how far a sample result may vary from the population value.
Response collection planner
Turn your response target into an estimate of invitations, reach, and collection effort.
A/B significance calculator
Compare two rates and measure how incompatible the observed difference is with the hypothesis of equal rates.
P-value calculator from a Z-score
Convert a Z score into a p-value and see how the selected tail changes the interpretation.
What is a good NPS score?
Understand the NPS reference ranges, why benchmarks vary by industry, and how to judge your own score honestly.
How to calculate NPS in Excel
Build the NPS calculation in any spreadsheet with COUNTIF and percentages — or download the ready-made NPSLab workbook.
NPS vs CSAT vs CES: which to use?
Compare the three experience metrics — recommendation, satisfaction, and effort — and learn where each belongs in the journey.
How to improve survey response rates
Practices that lift survey participation: the right moment, a short questionnaire, the right channel, and restrained reminders.
Transactional vs relationship NPS
Understand the difference between measuring the brand relationship and measuring a specific interaction — and when to use each.
How many questions in a survey?
The right questionnaire length: why fewer questions earn more responses, and how to cut without losing information.
Prefer Excel? Take the calculators with you
Every calculator on this page in one free spreadsheet — works in Excel, Google Sheets, and LibreOffice, no macros. Edit the yellow cells and the result appears with its interpretation.
Clarity before complexity
Your inputs stay on your device and the calculation is instant.
We show the formula, assumptions, and what the result cannot prove.
Every result ends with a clear recommendation for what to do next.
Ready to turn the calculation into a real survey?
Create the survey, collect responses, and track progress in NPSLab.