K-Factor is a metric used to describe the growth rate of a website or app. It measures how many new users each existing user recruits through word-of-mouth or integrated sharing features.

What is a "good" K-Factor?

Any K-Factor greater than 0 is positive, but a K-Factor >= 1 leads to sustainable exponential growth without additional marketing spend.

How do I improve my K-Factor?

Focus on reducing "Viral Cycle Time"—how long it takes for a user to invite someone—and increasing the incentive for users to share your product.

Is K-Factor the same as the Viral Coefficient?

In most marketing contexts, they are used interchangeably. Both describe the same fundamental growth mechanic: i x c = K.

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K-Factor Calculator

Calculate the viral growth metric for user acquisition and product virality.

K-Factor Calculator

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