Definition
A measure of viral spread equal to the number of invitations each existing user sends multiplied by the conversion rate of those invitations.
Why it matters for growth
A K-factor above 1 means a product can theoretically grow without any paid acquisition, since each user brings in more than one new user on average.
Example
If each user invites 5 friends and 25% convert, the K-factor is 1.25, meaning the user base compounds even with zero ad spend.
FAQ
- What is K-factor?
- A measure of viral spread equal to the number of invitations each existing user sends multiplied by the conversion rate of those invitations.
- Why does K-factor matter for growth?
- A K-factor above 1 means a product can theoretically grow without any paid acquisition, since each user brings in more than one new user on average.
- What is an example of K-factor?
- If each user invites 5 friends and 25% convert, the K-factor is 1.25, meaning the user base compounds even with zero ad spend.