Advertising · United States
Ecommerce Ad Budget Calculator
Set a monthly revenue target, the share you expect from paid channels, and a realistic target ROAS. The calculator returns the required ad budget in USD.
Inputs
Result
- Paid revenue target
- $55,000.00
- Monthly ad budget
- $15,714.29
- Approx. daily budget
- $523.81
- Cost per paid $1 of revenue
- $0.29
Split this across your channels using historical share as a starting point, then reallocate weekly based on incremental performance.
Method
Ad budget = (Monthly revenue target × Paid share %) ÷ Target ROAS.
Frequently asked questions
What target ROAS should I use?
Start with your break-even ROAS and add a margin for overhead and profit — often 1.15–1.5× break-even.
Why doesn't this include CAC?
This tool sizes a revenue-based budget. Use the CAC calculator to check unit economics after you know your paid CAC.
Method and guidance reviewed by the AIFlowBiz Editorial Team.
Related reading
Educational tool. Not financial, tax, or legal advice. Confirm current marketplace fees and tax rates from official sources.