Digital Marketing & Analytics
Intermediate

Viral Coefficient

Average number of new users each existing user brings in through referrals.

Formula

K=i×cK = i \times c

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Variables

KViral coefficient
iInvitations sent per user
cConversion rate of invitations

Example

Each user invites 5 friends, 20 % sign up → K = 1.0

Did You Know?

K > 1 means exponential growth — every user creates more than one new user, producing the legendary 'hockey stick' curve.

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