ATC to IC Rate measures the percentage of add-to-cart events that progress to initiate checkout.
ATC to IC Rate = ( Initiate Checkouts ÷ Add to Carts ) × 100
| Metric | Definition |
|---|
| Initiate Checkouts | Total checkout initiation events tracked |
| Add to Carts | Total add-to-cart events tracked |
| Metadata | |
|---|
| Type | Percentage |
| Data Source | Upstack Pixel |
| Aggregation | Ratio |
Example
Your store tracked 1,521 add-to-cart events in January, with 912 progressing to checkout.
| Metric | Value | Calculation |
|---|
| Add to Carts | 1,521 | Items added to cart |
| Initiate Checkouts | 912 | Checkout starts |
| ATC to IC Rate | 60.0% | (912 ÷ 1,521) × 100 |
How It Works
ATC to IC Rate calculates the conversion between cart addition and checkout initiation. The Upstack Pixel tracks add-to-cart events when visitors add products and initiate checkout events when they begin the checkout process.
When to Use
| Scenario | Action |
|---|
| Cart experience audit | Identify friction preventing checkout starts |
| Shipping threshold testing | Measure impact of free shipping offers |
| Trust signal optimization | Test security badges, reviews, guarantees |
| Mobile vs. desktop analysis | Compare checkout intent by device |
| Metric | Relationship |
|---|
| Add to Carts | Denominator — cart additions |
| Initiate Checkouts | Numerator — checkout starts |
| Add to Cart Rate | Previous funnel step — views to cart |
| Checkout Conversion Rate | Next funnel step — checkout to purchase |
