Ad Performance & ROAS Calculators
Stop optimizing for vanity metrics. Track true marketing efficiency.
ROAS & Net Profit Calculator
Determine if your Return on Ad Spend is actually profitable after deducting COGS and platform fees. 100% Free. Client-Side Privacy.
Formula: Net Profit = (Ad Spend * ROAS) - Ad Spend - COGS - Processing Fees
Amazon ACoS & TACoS Calculator
Calculate your Amazon PPC metrics to track Advertising Cost of Sales and Total ACoS accurately. 100% Free. Secure Client-Side Privacy.
Formula: TACoS = Total Ad Spend / Total Overall Revenue (Organic + Paid)
CPC, CPM, & CPA Ad Metrics Calculator
Break down your top-of-funnel ad metrics to find the true Cost Per Acquisition for Facebook and Google ads. 100% Free. Client-Side Privacy.
Formula: CPA = Total Ad Spend / Number of Conversions (or CPC / Conversion Rate)
MER (Marketing Efficiency Ratio) Calculator
Track your total Marketing Efficiency Ratio across all channels to see your true holistic ad performance. 100% Free. Client-Side Privacy.
Formula: MER = Total Store Revenue / Total Blended Ad Spend (Meta + Google + TikTok)
Decoding Ad Spend and Marketing Efficiency
In the post-iOS 14 era, relying solely on in-platform ad metrics is dangerous. Platforms like Meta, Google, and TikTok frequently over-report conversions, claim overlapping attribution, and present inflated ROAS (Return on Ad Spend) numbers. To scale a profitable e-commerce brand, you must transition from tracking vanity top-of-funnel metrics to measuring holistic, store-wide marketing efficiency.
1. The ROAS Illusion vs. Net Profit
ROAS is a top-line revenue metric; it does not account for the costs associated with fulfilling the order. An ad campaign generating a 3.0x ROAS might appear highly successful, but if your COGS, shipping, and platform fees consume 75% of your revenue, that 3.0x ROAS is actually generating a net loss. The only metric that matters is Profit on Ad Spend (POAS) or True Net Profit. You must dynamically deduct your exact fulfillment costs from the attributed revenue to determine if an ad set deserves increased budget.
2. Shifting from ROAS to MER (Marketing Efficiency Ratio)
Because multi-touch attribution is increasingly fragmented, elite media buyers now rely heavily on the Marketing Efficiency Ratio (MER). MER is calculated by taking your total store revenue (from all sources: organic, email, paid social, search) and dividing it by your total blended ad spend across all platforms. This provides a macro-level view of your business health. If your MER is 4.0, it means that for every $1 spent across the entire marketing ecosystem, the business generated $4 in total revenue.
3. Amazon ACoS and TACoS
For Amazon sellers, PPC advertising is mandatory for organic ranking. Advertising Cost of Sales (ACoS) measures the direct profitability of a campaign. However, just like MER, the true indicator of Amazon health is Total ACoS (TACoS). TACoS divides your total ad spend by your total overall sales (both paid and organic). A healthy, highly-ranked Amazon product will see its TACoS decrease over time as organic sales volume outpaces the required PPC spend.