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Average spend per ad share—a lower cost-per-share can signal strong word-of-mouth potential.

Formula

Meta Cost per Share = Meta Spend ÷ Meta Shares

Formula Components

MetricDefinition
Meta SpendTotal amount spent on Meta advertising campaigns
Meta SharesNumber of times users shared your Meta ad content
Metadata
TypeCurrency
Data SourceMeta Ads
AggregationRatio

Example

Your brand awareness campaign spent $4,000 and generated 800 shares last month.
MetricValue
Meta Spend$4,000
Meta Shares800
Meta Cost per Share$5.00
At $5.00 per share, each share costs five dollars—but that share exposes your ad to the sharer’s entire network at no additional cost.

How It Works

Meta Cost per Share divides your total ad spend by the number of shares. Shares amplify your reach organically—each share exposes your ad to the sharer’s network without additional spend. Lower cost per share indicates content that resonates enough for users to publicly endorse and redistribute.

When to Use

ScenarioAction
Identifying viral-worthy contentCompare cost per share across creatives to find what audiences want to redistribute
Evaluating organic amplification potentialLower cost indicates stronger word-of-mouth efficiency per dollar spent
Optimizing brand awareness campaignsPrioritize ad sets with lower cost per share for earned reach
Benchmarking shareabilityCompare to cost per other engagement types to understand sharing versus passive engagement

MetricRelationship
Meta SharesDenominator in this calculation
Meta SpendNumerator in this calculation
Meta Cost per EngagementBroader engagement efficiency including all interaction types
Meta Engagement RateShows engagement as percentage of reach, not cost efficiency
See all Meta Engagement metrics →