What is a Viral Coefficient?

The viral coefficient (K) is a metric that indicates how many new users are generated by each existing user. It is the core driver of organic, "viral" growth.

How do you calculate Viral Coefficient?

K = Average Number of Invitations Sent per User x Conversion Rate of those Invitations. For example, if each user invites 10 friends and 10% sign up, K = 1.

What does a Viral Coefficient of 1 mean?

A K-factor of 1 is the "tipping point". It means every new user brings in exactly one other user, leading to linear, perpetual growth. If K > 1, your product is growing exponentially.

How can I increase my K-factor?

Increase the number of invitations sent (by making sharing easier/more rewarding) or increase the conversion rate (by improving the landing page for referred users).

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Viral Coefficient Calculator

Measure the viral growth potential of your product and optimize referral mechanics.

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Enter your referral metrics to calculate virality

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