Ad Budget Allocator

Budget allocation is one of the highest-leverage decisions in ecommerce marketing. Most brands either split budget evenly across channels or allocate based on gut feel and historical precedent. Neither approach is optimal. This calculator uses an efficiency-weighted model that automatically directs more budget to channels with lower CPAs, maximizing total conversions for any given budget.

The logic is straightforward: if Meta delivers customers at $45 each and email delivers at $12, email should receive a proportionally larger share of budget relative to its efficiency. The calculator handles this math instantly across up to four channels, showing you the recommended dollar allocation, percentage share, and estimated conversion count for each.

This approach works best as a starting point for monthly planning. Real-world allocation also needs to account for channel capacity (you cannot infinitely scale email), diminishing returns at higher spend levels, and strategic goals like brand awareness that may justify spending on less efficient channels. But starting from an efficiency-weighted baseline ensures you are not leaving easy conversions on the table.

For DTC brands spending $10K to $100K per month across multiple channels, even a 10% improvement in allocation efficiency can mean hundreds of additional conversions per month. Use this tool at the start of each month alongside your ROAS calculator and MER tracker to set informed budget targets.