Ad Budget Calculator
Spend about $12,500 to reach $50,000 in revenue at 4x ROAS.
What is Ad budget?
Ad budget here is the spend you need to hit a revenue goal, calculated as revenue target divided by the ROAS you can realistically achieve. To reach 50,000 at a 4x return, you need to spend 12,500.
It is the ROAS calculation run backwards. Instead of measuring the return on spend you made, it sizes the spend required for the return you want.
The whole answer turns on the ROAS you assume. Use a figure you have genuinely hit before, because an inflated ROAS will undersize the budget and leave the goal out of reach.
How to calculate Ad budget
Budget = Revenue target ÷ Target ROAS
- Set the revenue target. Decide the revenue you want the campaign to generate, for example 50,000.
- Pick a realistic ROAS. Use a return on ad spend you have actually achieved on similar campaigns, for example 4x.
- Divide target by ROAS. Revenue target divided by ROAS is the budget. 50,000 ÷ 4 = 12,500.
- Break it into a daily cap. Divide by the days in the period for a daily spend. Over 30 days, 12,500 is about 417 a day.
Worked example
You want 50,000 in revenue and expect a 4x return on ad spend.
| Revenue target | $50,000 |
|---|---|
| Target ROAS | 4x |
| Result | $12,500 required ad budget |
You need about 12,500 in spend to reach 50,000 at a 4x ROAS. Spread over 30 days that is roughly 417 a day. Hit a higher ROAS and the same goal costs less; fall short and you will need more.
How to improve Ad budget
- Anchor the ROAS input to real past results so the budget is grounded, not aspirational.
- Model a conservative and an optimistic ROAS to see the spend range before you commit.
- Lift the underlying ROAS (better conversion, higher order value) so the same goal needs less budget.
- Check the budget is one you can actually fund at the daily pace before launch, not just in total.
Frequently asked questions
- How do you calculate the ad budget for a revenue target?
- Divide your revenue target by the ROAS you can realistically achieve. To reach 50,000 in revenue at a 4x return on ad spend, you need to spend 50,000 ÷ 4 = 12,500. It is the ROAS formula rearranged to solve for spend instead of return.
- What is a good ad budget?
- There is no universal figure: the right budget is whatever your revenue goal divided by your achievable ROAS works out to. The two levers are how much revenue you want and how efficiently your ads convert it. A higher ROAS means you reach the same goal on less spend.
- What ROAS should I plug in?
- Use a ROAS you have actually achieved on similar campaigns, not an aspirational one, since an optimistic number undersizes the budget and leaves you short of the goal. If you are unsure, run a conservative figure and a stretch figure to see the spend range. The break-even ROAS calculator shows the lowest ROAS that still profits.
- How do I turn the budget into a daily spend?
- Divide the total budget by the number of days in the period. A 12,500 budget over 30 days is about 417 per day. That daily figure is what you set as the campaign cap, though real platforms pace spend unevenly across a month.