Viral Coefficient

Overview

What if one user could bring in ten more, and each of those ten brought in ten more—without spending a dime on ads? That’s the power of the viral coefficient, a key metric in business that measures how contagious your product or idea is.

Key Components

It’s used when growth depends on users inviting others, like in social networks or referral programs. Visualizing it as a diagram, the coefficient is the average number of new users each existing user brings in.

How to Apply

To apply it, calculate the ratio of invitees to current users—when that number exceeds one, growth takes off. Understanding this framework helps businesses design products that spread like wildfire.

Key Insight