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Dallas McLaughlin Digital Marketing

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ROAS Calculator

The ROAS Calculator divides revenue by ad spend to give you return on ad spend — the core efficiency metric for any paid media campaign tied to revenue outcomes.

Enter your total ad spend and the total revenue attributed to that spend to calculate your return on ad spend (ROAS).

About ROAS Calculator

Return on ad spend (ROAS) is the primary efficiency metric for revenue-generating paid media campaigns. It answers a direct question: for every dollar spent on advertising, how many dollars in revenue were returned?

The formula is simple: Revenue ÷ Ad Spend = ROAS. A campaign that spent $5,000 and returned $20,000 in revenue has a ROAS of 4.0, commonly expressed as 4:1 or 400%.

ROAS benchmarks vary by industry and business model. Most e-commerce advertisers target a 4:1 ROAS as a general baseline, but the right target is always margin-dependent. A business with 70% gross margins can be profitable at 2:1; a business with 20% margins may need 6:1 or higher to break even on ad spend. Knowing your margin is essential to knowing whether a given ROAS is actually good or just a number.

Media buyers use ROAS to evaluate campaign efficiency, allocate budget across channels and campaigns, and set automated bidding targets in platforms like Google Ads. Target ROAS (tROAS) bidding instructs the algorithm to optimize toward a specific return — but that target is only meaningful if it’s grounded in the business’s actual margin structure.

ROAS is a revenue metric, not a profit metric. It does not account for cost of goods, fulfillment, or operating overhead. Use ROAS alongside gross margin data to get a complete picture of campaign profitability.

Pair this tool with the Margin Calculator and CPA Calculator for a full profitability view.

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Paid Media Metrics: Key Terms, Formulas, and Definitions

Spend
Spend is the net advertising cost - the hard cost of media only. This does not include management fees, creative production, or any other service fees.
Impressions
Impressions are the number of times an ad was shown in a given channel - the total volume of ad views delivered by the advertising spend.
Cost-per-thousand Impressions (CPM)
CPM is the cost of purchasing 1,000 impressions. It is the standard buying metric for display, programmatic, and streaming TV advertising. Formula: (Spend ÷ Impressions) × 1,000 = CPM
Click-through Rate (CTR)
CTR is the rate at which impressions result in a click. If 1,000 ads are shown and 10 people click, the CTR is 1%. Formula: Clicks ÷ Impressions = CTR
Clicks
Clicks are the total number of times an ad was clicked. The click metric is also commonly used as a proxy for website sessions driven by paid advertising.
Cost-per-click (CPC)
CPC is the average advertising cost paid per click. Formula: Spend ÷ Clicks = CPC
Conversions
Conversions are the total number of desired actions - sales, leads, form submissions, downloads, or other defined goals - attributed to the advertising spend.
Conversion Rate
Conversion rate is the percentage of clicks that result in a conversion action - a lead, purchase, download, or other defined goal. Formula: Conversions ÷ Clicks = Conversion Rate
Cost-per-acquisition (CPA)
Cost-per-acquisition (CPA), also called cost-per-conversion, is the average amount of advertising spend required to generate one conversion action. Formula: Spend ÷ Conversions = CPA
Return on Ad Spend (ROAS)
ROAS measures how much revenue is generated per dollar of advertising spend. A 4x ROAS means $4 in revenue for every $1 spent - but profitability depends on your margin. Formula: Revenue ÷ Spend = ROAS
Markup
Markup is the percentage added above the cost of a product to arrive at the selling price. It is calculated relative to cost, not revenue - which is the key distinction between markup and margin. Formula: (Selling Price − Cost) ÷ Cost = Markup %
Margin
Gross margin is the percentage of revenue retained after deducting the cost of goods sold. Unlike markup (which is based on cost), margin is calculated relative to revenue - the number that ties directly to advertising profitability targets. Formula: (Revenue − Cost) ÷ Revenue = Margin %
Revenue
Revenue is the total income generated from sales before any costs are deducted. In paid media analysis, revenue attributed to advertising spend is the numerator in ROAS calculations.
Budget
Budget is the total advertising spend allocated to a campaign or channel for a defined period. Budget planning typically begins with a target CPA or ROAS and works backward from desired conversion volume.

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