ROAS Calculator

What is ROAS?

ROAS (return on ad spend) measures how much attributed revenue your ads generate for every unit of ad spend. If your campaign produces $4,000 in attributed revenue on $1,000 spend, your ROAS is 4.0x.

For ecommerce brands, ROAS is one of the fastest ways to evaluate paid media efficiency across Meta, Google, YouTube, and marketplaces. But ROAS should always be interpreted alongside your margin structure. A campaign can show strong ROAS and still be economically weak if contribution margin is thin.

ROAS formula

ROAS = Revenue / Ad Spend

ROAS % = (Revenue / Ad Spend) × 100

ROAS is usually shown as a multiple (for example, 3.8x), while ROAS % expresses the same value as a percentage (380%).

What is break-even ROAS?

Break-even ROAS is the minimum ROAS you need to avoid losing money on variable costs.

In ecommerce, variable costs typically include:

• Cost of goods sold (COGS)
• Shipping and fulfillment
• Transaction or platform fees
• Discounts
• Expected returns and refunds

Once these are included, break-even ROAS gives you a realistic floor for scaling decisions.

Break-even ROAS formula

Break-even ROAS = 1 / contribution margin %

If contribution margin is 40%, break-even ROAS is 2.5x. If contribution margin drops to 20%, break-even ROAS jumps to 5.0x. That is why margin quality often matters more than vanity ROAS benchmarks.

What is a good ROAS?

There is no universal "good ROAS." The right target depends on your product economics, payback window, and growth strategy.

A healthy benchmark for one store can be underperforming for another. For example, a brand with high repeat purchases may accept lower first-order ROAS, while a low-repeat brand may need much higher ROAS upfront. In practice, a good ROAS is any ROAS that consistently clears your break-even threshold with room for operating costs and profit.

ROAS vs ROI

• ROAS focuses on advertising spend versus attributed revenue.
• ROI includes broader costs such as salaries, software, overhead, and operations.

Use ROAS for campaign optimization and media buying decisions. Use ROI for broader business performance and capital allocation.

Ecommerce examples

Example 1: Healthy-margin product

• Selling price (AOV): $200
• Net contribution margin: $75 (37.5%)
• Break-even ROAS: 2.67x

If your actual ROAS is 4.2x, you are materially above break-even and likely profitable before fixed overhead.

Example 2: Low-margin product

• Selling price (AOV): $100
• Net contribution margin: $18 (18%)
• Break-even ROAS: 5.56x

A 4.0x ROAS may look impressive on the surface, but this campaign is still below break-even for variable-cost profitability.

Why manual ROAS calculators are limited

A static calculator tells you what your ROAS should be. It cannot tell you what it actually is right now, because your Shopify revenue, ad spend, and return rate are all moving at the same time. By the time you have updated the spreadsheet, the numbers are already stale.

Teams running paid channels usually need live visibility into:

• Actual ad spend by channel and campaign
• Attributed revenue updated in near real time
• Discounts and returns that reduce net revenue
• Cost and margin shifts by SKU or product family

That is where connected reporting makes the difference. Instead of recalculating in spreadsheets after every budget review, Daymark connects your Shopify store and ad accounts so you can monitor ROAS, break-even thresholds, and channel profitability continuously from one place.