Conjoint Analysis Sample Size Calculator

Introduction & Importance

Conjoint analysis is a powerful market research technique used to determine how people value the different attributes that make up an individual product or service. The sample size calculator is a crucial tool to ensure the reliability and validity of your conjoint analysis.

How to Use This Calculator

Enter the number of alternatives (n) in your study.
Enter the number of attributes (k) in your study.
Select the desired reliability (r) level.
Click ‘Calculate’ to find the recommended sample size.

Formula & Methodology

The sample size formula used in this calculator is based on the work of Orme (2005):

N = (k * (n – 1)) / (r * (1 – r) * (k – 1))

Real-World Examples

Data & Statistics

Sample Sizes for Different Reliability Levels
Number of Alternatives (n)	Number of Attributes (k)	Reliability (r)	Sample Size (N)

Expert Tips

Always strive for the highest reliability level that your resources allow.
Consider using a fractional factorial design to reduce the number of profiles needed.
Pilot test your survey to ensure clarity and accuracy.