What is a good ROAS for an online store?

A common rule of thumb is a 3.0–4.0 ROAS for established eCommerce, but the only number that matters is your break-even ROAS, which is set by your gross margin (break-even ROAS = 1 ÷ margin). A store with thin 30% margins needs a much higher ROAS to profit than one selling 70%-margin goods. Use this calculator to find your real result, then compare it against your own break-even rather than a generic benchmark.

How do I calculate ROAS for my Shopify store?

Enter your total ad spend, your cost per click, your store conversion rate, and your average order value. The calculator derives clicks, orders, revenue, and ROAS for you (ROAS = revenue ÷ ad spend). Because the eCommerce tab treats every conversion as an immediate sale, the result maps directly to the revenue figures you see in Shopify and your ad platform.

Should I use ROAS or MER for my store?

ROAS measures a single campaign or channel; MER (Marketing Efficiency Ratio) measures total revenue against total marketing spend across everything. Platform-reported ROAS increasingly over-credits itself as attribution degrades, so many DTC brands now steer by blended MER for the truth and use per-campaign ROAS for tactical decisions. Run both and watch the gap between them.

eCommerce ROAS Calculator

Calculate store ROAS from spend, conversion rate, and order value

Business Type

Monthly Ad Spend ($)

Average Cost per Click ($)

Conversion Rate (%)

Percentage of visitors who make a purchase

Average Order Value ($)

ROAS sits inside a larger paid-media efficiency framework. Use these definitions and adjacent calculators to interpret your result in context — channel benchmarks, attribution caveats, LTV-adjustment, and the testing cadence that actually moves ROAS over time.

Glossary terms

ROAS — Canonical definition + benchmarks by channel.
MER — Account-level efficiency when iOS 14.5+ attribution breaks per-channel ROAS.
Customer LTV — LTV-adjusted ROAS for subscription / repeat-purchase businesses.
ROI — How ROAS differs from full-cost return.
CAC — Acquisition cost paired with ROAS to grade unit economics.
CPM — Upstream cost driver that pushes ROAS down independent of creative quality.

Other calculators

MER Calculator — When channel ROAS misleads, switch to account-level MER.
LTV Calculator — Compute customer lifetime value to LTV-adjust ROAS.
Creative Testing Calculator — Sample sizes for the A/B tests that drive ROAS lift.
Incrementality Calculator — Strip the "what would have happened anyway" from observed ROAS.

Frequently Asked Questions

eCommerce ROAS Calculator

Free eCommerce ROAS calculator for online stores: turn ad spend, click cost, conversion rate, and average order value into return on ad spend and profit. Built for Shopify, DTC, and online-store paid media where the sale is the conversion.

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Calculate and analyze your return on ad spend (ROAS) to optimize campaign performance. Get data-driven insights on advertising efficiency, revenue attribution, and budget allocation to maximize marketing ROI.

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Calculate Cost Per Mille (CPM) and analyze advertising campaign performance with precision. Get comprehensive insights on media buying efficiency, budget optimization, and campaign ROI analysis.

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Measure the true impact of your marketing campaigns by calculating incrementality. Understand which portion of your conversions would have happened organically versus those directly caused by your marketing efforts.

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Related Terms

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Return on Ad Spend

Return on Ad Spend (ROAS) is a marketing performance metric that measures the revenue generated per dollar of advertising spend. Unlike ROI which considers all business costs, ROAS specifically evaluates advertising efficiency by comparing directly attributable revenue to ad spend. This metric is crucial for optimizing campaign performance, budget allocation, and overall marketing strategy.

glossary-term

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Marketing Efficiency Ratio

Marketing Efficiency Ratio measures the overall effectiveness of marketing spend by comparing total revenue to total marketing costs. It provides a holistic view of marketing performance across all channels and customer types, including both direct and indirect revenue attribution. Also known as 'blended MER' since it considers all revenue rather than just attributed revenue.

glossary-term

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Direct-to-Consumer

Direct-to-Consumer (DTC) is a business and marketing model where companies sell products directly to end consumers, bypassing traditional retail intermediaries. This approach enables brands to own the customer relationship, control the shopping experience, and gather first-party data while typically offering better value through reduced distribution costs.

glossary-term

eCommerce ROAS Calculator