Calculate blended ROAS across multiple advertising channels. Compare channel-level and total portfolio return on ad spend for complete performance visibility.
Most businesses advertise across multiple channels: Google Ads, Facebook, Instagram, TikTok, and more. Each channel has its own ROAS, but your overall advertising efficiency is measured by blended ROAS — total revenue from all channels divided by total ad spend across all channels.
Blended ROAS gives you the portfolio-level view that individual channel metrics miss. A channel with 2x ROAS might be worth keeping if it contributes to a blended portfolio ROAS of 5x by driving assisted conversions elsewhere. Conversely, a channel showing 8x ROAS might be cannibalizing conversions that would have happened anyway.
This calculator lets you input revenue and spend for up to five channels and computes both individual and blended ROAS, helping you evaluate your complete advertising portfolio.
This measurement provides a critical foundation for marketing budget allocation, helping teams invest where they will achieve the greatest impact on brand awareness and revenue growth. Integrating this calculation into regular reporting cycles ensures that strategic marketing decisions are grounded in measurable outcomes rather than intuition or anecdotal evidence.
Individual channel ROAS can be misleading due to attribution overlap. Blended ROAS shows your true overall advertising efficiency and helps you make portfolio-level budget decisions. Regular monitoring of this value helps marketing teams detect shifts in audience behavior early and adapt strategies before competitive advantages are lost in the marketplace.
Blended ROAS = Total Revenue (All Channels) ÷ Total Ad Spend (All Channels) Channel ROAS = Channel Revenue ÷ Channel Spend Spend Share = Channel Spend ÷ Total Spend × 100
Result: 3.33x Blended ROAS
Google: $40K/$10K = 4.0x. Facebook: $25K/$8K = 3.13x. TikTok: $5K/$3K = 1.67x. Blended: $70K/$21K = 3.33x. Google is most efficient, TikTok is below portfolio average but may drive awareness that feeds other channels.
Blended ROAS is the most honest measure of advertising performance because it avoids the attribution biases inherent in channel-level reporting. While Google might claim $50K in conversions and Facebook might claim $40K, your actual revenue might be $70K. Blended ROAS uses actual revenue.
Multi-touch customer journeys mean multiple channels claim credit for the same sale. Last-click attribution favors bottom-funnel channels (Search, Brand). First-click favors top-funnel (Display, Social). Blended ROAS sidesteps this debate by looking at totals.
Think of your ad budget as an investment portfolio. Each channel is an asset with its own return profile. Optimize the portfolio for maximum total return, not individual asset performance. Sometimes a lower-ROAS channel improves the portfolio by feeding higher-ROAS channels.
Monitor blended ROAS monthly and quarterly. Rising blended ROAS with stable spend means improving efficiency. Falling blended ROAS might signal increasing competition, audience fatigue, or attribution shifts. Use trend data for strategic budget planning.
Blended ROAS is total attributed revenue from all advertising channels divided by total ad spend across all channels. It's your aggregate advertising efficiency metric that accounts for the total investment.
Individual channels often claim credit for the same conversions (attribution overlap). A customer might click a Facebook ad, then convert via Google Search. Both platforms claim the sale. Blended ROAS avoids double-counting by using total actual revenue.
Run incrementality tests: pause the channel for 2–4 weeks and watch whether other channels' ROAS and overall revenue change. If total revenue drops more than the paused channel's attributed revenue, it was contributing incrementally.
Target the same break-even ROAS you would for any channel: 1 ÷ profit margin, plus your desired profit margin. If your break-even is 2.5x, target blended ROAS of 3–4x.
Not necessarily. Channel ROAS typically decreases as you spend more (diminishing returns). Moving budget from a 2x channel to a 5x channel may lower that 5x to 3x. Optimize incrementally, not all at once.
Marketing Efficiency Ratio (MER) is total revenue divided by ALL marketing spend (including organic, content, etc.), while blended ROAS only includes paid ad channels. MER gives a broader view; blended ROAS is ad-specific.