Return on Ad Spend (ROAS) measures revenue generated per dollar spent on advertising. A ROAS of 4:1 means every dollar of ad spend produces four dollars of revenue. It is the primary metric for evaluating paid advertising performance.

How do you calculate ROAS?

ROAS = Revenue from ads / Cost of ads. If a campaign costs $1,000 and generates $5,000 in revenue, your ROAS is 5.0 (or 5:1). Make sure you attribute revenue correctly to the specific campaign or channel.

A 4:1 ROAS (400%) is a common benchmark, but the right target depends on your margins. If your profit margin is 50%, you need at least a 2:1 ROAS to break even on ad spend. High-margin businesses can profit at lower ROAS; low-margin businesses need higher ROAS.

What is the difference between ROAS and ROI?

ROAS measures revenue against ad spend only. ROI measures profit against total investment (including product costs, overhead, and labor). A campaign can have a great ROAS but poor ROI if your margins are thin. Track both.

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ROAS Calculator

Calculate your return on ad spend, net profit from ads, and break-even ROAS.

Total spent on ads (all platforms combined or per campaign)

Revenue from Ads

COGS for Ad-Driven Sales

Cost of goods/services sold from ad-driven orders

Number of Conversions (optional)

Purchases, sign-ups, or leads from ads

What Is ROAS and Why It Matters

ROAS (Return on Ad Spend) measures how much revenue you earn for every dollar you spend on advertising. It is the key metric for deciding whether your ads are profitable and where to allocate your marketing budget.

A ROAS of 4.0 means you earn $4 for every $1 spent on ads. But that does not necessarily mean you are profitable, since you still need to cover the cost of goods, overhead, and fulfillment.

How ROAS Is Calculated

ROAS = Revenue from Ads / Ad Spend

This gives you the gross return. The calculator also shows:

Net Profit from Ads: Revenue minus ad spend minus COGS for ad-driven sales
Break-Even ROAS: The minimum ROAS needed to cover your ad spend plus COGS
Cost Per Acquisition (CPA): What you pay to acquire each customer through ads

What Is a Good ROAS?

It depends on your margins, industry, and advertising platform. Here are typical benchmarks:

By Platform

Google Ads (Search): 2:1 to 4:1 is common. High-intent keywords can exceed 8:1.
Google Ads (Shopping): 4:1 to 10:1 for well-optimized product feeds.
Meta (Facebook/Instagram): 2:1 to 5:1 for most small businesses. 1.5:1 is acceptable for brand awareness.
TikTok Ads: 1.5:1 to 3:1 is typical. Lower ROAS is common since the platform skews toward discovery.

By Industry

E-commerce: 4:1 or higher (lower margins need higher ROAS)
Restaurants / Food Service: 3:1 to 5:1
Professional Services: 5:1 to 10:1 (higher margins, fewer but larger transactions)
Retail (Brick and Mortar): 3:1 to 6:1
SaaS / Subscriptions: 3:1+ (factor in lifetime value, not just first purchase)

Break-Even ROAS: The Number That Actually Matters

Your break-even ROAS tells you the minimum return needed to not lose money on ads.

Break-Even ROAS = 1 / (1 - COGS %) where COGS % is your cost of goods as a percentage of revenue.

Example: If your COGS is 40% of revenue, your break-even ROAS is 1 / (1 - 0.40) = 1.67. Any ROAS above 1.67 means your ads are profitable after covering product costs.

If your actual ROAS is 3.0 and break-even is 1.67, you have a healthy cushion. If your ROAS is 1.8 and break-even is 1.67, you are barely profitable, and any dip in performance puts you in the red.

Common ROAS Mistakes

Ignoring COGS. A 3:1 ROAS looks great until you realize your product costs eat 60% of revenue. Your actual profit might be negative.
Comparing across platforms blindly. Google Search captures high-intent buyers (higher ROAS). Meta and TikTok drive discovery (lower ROAS but new customer acquisition). They serve different purposes.
Chasing ROAS at the expense of volume. You can get a 10:1 ROAS by only bidding on branded keywords, but you will miss new customers entirely. Sometimes a 2:1 ROAS on prospecting ads grows your business faster than a 6:1 on retargeting.
Not accounting for lifetime value. If a customer acquired at $50 CPA spends $500 over their lifetime, a 1.5:1 first-purchase ROAS is actually excellent.
Measuring too early. Ad campaigns need time (and data) to optimize. Judge performance after at least 2-4 weeks of data, not 3 days.

How to Improve Your ROAS

Improve your landing pages. Better conversion rates mean more revenue per click.
Tighten your targeting. Show ads to people more likely to buy.
Test creative. New ad images and copy can double your click-through rate.
Raise prices. Higher average order value directly improves ROAS.
Reduce COGS. Better margins make every sale more profitable.
Use retargeting. Showing ads to people who already visited your site is almost always your highest-ROAS campaign.

Use this calculator alongside the Break-Even Calculator and Markup & Margin Calculator to see the full picture of your advertising profitability.