How to Allocate Ad Budget Across Channels
Splitting budget evenly across channels wastes spend when performance differs. This tool uses Channel Budget = Total Budget × (Channel ROAS ÷ Sum of All ROAS) to shift more budget toward higher-performing channels.
ROAS (return on ad spend) is a common performance metric, but you can substitute CVR or CPA depending on your goal. What matters is reflecting relative performance differences in the allocation.
Avoid shifting budgets too abruptly — large changes can reset a platform's learning phase and temporarily hurt performance. Phase in adjustments over one to two weeks for safer results.
Frequently Asked Questions
Total budget is split proportionally to each channel's ROAS share. Channels with higher ROAS receive a larger portion of the budget, improving overall ad efficiency.
This calculator is built around ROAS. If you use CPA, convert it to its inverse (1/CPA) before entering it for a comparable calculation.
Sudden budget changes can reset a platform's learning phase and temporarily hurt performance. Phase in the adjustment gradually over one to two weeks.