Meta Cost per Purchase measures how much you spend on average for each purchase attributed to your Meta ads.
Meta Cost per Purchase = Meta Spend ÷ Meta Purchases
| Metric | Definition |
|---|
| Meta Spend | Total amount spent on Meta advertising |
| Meta Purchases | Number of purchases attributed to Meta ads |
| Metadata | |
|---|
| Type | Currency |
| Data Source | Meta Ads |
| Aggregation | Ratio |
Example
Your skincare brand spent $2,450 on Meta ads in March and drove 98 purchases.
| Metric | Value | Insight |
|---|
| Ad Spend | $2,450 | Total Meta budget consumed |
| Purchases | 98 | Orders attributed to Meta |
| Cost per Purchase | $25.00 | Average acquisition cost |
How It Works
Meta tracks purchases using pixel events and Conversions API data. When a user who saw or clicked your ad completes a purchase within the attribution window, Meta credits that sale to the campaign. This metric divides your total spend by those attributed purchases.
When to Use
| Scenario | Action |
|---|
| Compare campaign efficiency | Lower cost per purchase = more efficient spend |
| Set target acquisition costs | Benchmark against your average order value |
| Identify underperforming ads | Pause ads with cost per purchase above target |
| Scale profitable campaigns | Increase budget on ads with low acquisition costs |
| Metric | Relationship |
|---|
| Meta Purchases | The denominator in this calculation |
| Meta Spend | The numerator in this calculation |
| Meta CPA | Alternative name for cost per acquisition |
