Marketing & Advertising
Search Advertising Budget Calculator
Translate a monthly paid-search budget into impressions, clicks, customers, attributed revenue, gross profit, campaign contribution, ROAS, and customer acquisition cost.
Expected paid clicks-
Impressions implied by CTR-
Expected customers-
Attributed revenue-
Gross profit before media and fixed campaign cost-
Gross profit less media and fixed cost-
Attributed revenue divided by media spend-
Modeled ROAS minus entered target-
Media spend per expected customer-
Decision view
Paid-search conversion and value funnel
Paid-search conversion and value funnelThe current budget flows through impressions, clicks, expected customers, attributed revenue, and gross profit.
Exact scenario comparisonAverage cost per click changes while all other entered assumptions remain constant.
| Average cost per click | Expected paid clicks | Impressions implied by CTR | Expected customers | Attributed revenue | Gross profit before media and fixed campaign cost | Gross profit less media and fixed cost | Attributed revenue divided by media spend | Modeled ROAS minus entered target | Media spend per expected customer |
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How to use Search Advertising Budget Calculator
- Enter media budget and average CPC.
- Enter CTR and click-to-customer conversion as percentages.
- Add attributed revenue per customer, gross margin, and fixed campaign cost.
- Compare ROAS, CAC, and contribution rather than relying on one headline metric.
Calculator guide
Understanding Search Advertising Budget Calculator
A media budget becomes business value through a chain of rates: cost per click, click-through rate, conversion rate, revenue per customer, and gross margin. This calculator preserves every stage so a strong ROAS cannot hide weak contribution after campaign costs.
Calculation method
How the calculation works
Carry a fixed media budget through CPC, CTR, conversion, customer revenue, gross margin, and fixed campaign cost to show both revenue and contribution economics. Divide spend by CPC, infer impressions from CTR, apply conversion to clicks, then apply customer revenue and gross margin before subtracting media and fixed campaign cost.
Detailed calculation process
Carry media spend through the paid-search conversion chain
The default spends $25,000 at $2.40 per click, uses 4.2% CTR and 3.8% conversion, and values each customer at $520 of attributed revenue with a 58% gross margin.
General formula: K = B/c; I = K/r_c; N = Kr_v; R = Ny; G = Rm; P = G-B-F; ROAS = R/B; CAC = B/N Budget divided by CPC gives clicks. CTR is used only to infer impressions, while conversion turns clicks into customers. Customer revenue becomes attributed revenue; gross margin then isolates gross profit before subtracting campaign costs.
What each symbol means
Worked substitution with the default inputs
The default funnel yields about 248,016 impressions, 10,417 clicks, 395.833 expected customers, 8.233 ROAS, $63.158 media CAC, and $90,183.333 campaign contribution.
Conversion pathway
Follow one budget through every stage
A proportional funnel keeps impressions, clicks, customers, revenue, and gross profit linked to current inputs.
Worked situations
Practical examples
- The budget buys about 10,416.667 clicks.
- At 3.8% conversion, those clicks imply 395.833 expected customers.
- The default modeled ROAS exceeds the entered target by 4.233.
Better inputs
Useful tips
- Use a CPC and conversion rate from the same time period and campaign scope.
- Separate branded and nonbranded traffic when their economics differ.
- Test lower conversion or higher CPC before committing the full budget.
Before relying on the result
Limitations and common mistakes
- Rates are held constant as spend scales.
- Attribution is not the same as incremental causal revenue.
- Refunds, invalid traffic, conversion delay, auction response, tax, agency fees, and capacity constraints are excluded.
Reference
Key terms
- CTR
- Clicks divided by impressions.
- ROAS
- Attributed revenue divided by media spend.
- Media CAC
- Media spend divided by expected acquired customers.
Important note
Calculated from the entered campaign values. Validate attribution, incrementality, lag, margin, and observed source data before making decisions.
Frequently asked questions
Why are expected customers fractional?
The result is the statistical average implied by the rates, not a literal partial customer.
Why can ROAS look strong when contribution is weak?
ROAS ignores gross margin and fixed campaign cost.
Does CTR affect customer count here?
Not when budget and CPC already fix clicks; it changes the impressions required to obtain those clicks.
Is attributed revenue incremental?
Not necessarily; incrementality requires an appropriate causal comparison.