Free online calculator
Ad Spend Budget Calculator
Estimate the ad budget implied by a revenue target and expected ROAS. Includes a worked example, formula and practical FAQs.
Formula: Required ad spend = target revenue ÷ expected ROAS
How to use the Ad Spend Budget Calculator
Estimate the ad budget implied by a revenue target and expected ROAS. Enter ROAS as a multiple rather than as a percentage.
Formula
Required budget = target attributed revenue ÷ expected ROAS.
Worked example
A $10,000 attributed revenue target at 4× expected ROAS implies a $2,500 budget.
Interpretation and limitations
Expected ROAS must be positive. This is a planning scenario, not a forecast of guaranteed sales. Performance can change as spend scales, so test several plausible ROAS values.
Ad Spend Budget questions
How do I enter 400% ROAS?
Enter 4, because 400% corresponds to a 4× revenue multiple.
Does this cover all business spending?
No. It estimates advertising spend only. Product, fulfillment, staffing and other costs require separate budgeting.
Continue your calculation
For the next step, use the Revenue From ROAS Calculator or the Break-Even ROAS Calculator. Review each tool’s input definitions before carrying a result into another calculation.
Frequently asked questions
Is this calculator free?
Yes. It runs in your browser and does not require an account.
How should I use the result?
Use the result as a planning estimate and verify business-critical decisions against your source records.