# Ad Spend ROI Calculator | Advertising ROI & ROAS Turn advertising spend, the revenue it drives, and your gross margin into both ROAS and true marketing ROI. See return on ad spend and the COGS-aware, profit-based ROI behind it so you can defend ad budgets with the number finance actually asks for. ## ROAS vs ad ROI ROAS is revenue per dollar of ad spend (revenue ÷ ad spend). ROI is profit per dollar of ad spend, expressed as a percentage: **ROI = net profit ÷ ad spend × 100**, where net profit subtracts cost of goods (via your gross margin) and the ad spend itself from revenue — not just the ad spend. A campaign can show a healthy 4.0 ROAS and still be a poor ROI once product costs are subtracted. ## ROAS vs ad ROI — comparison table | Metric | Formula | Includes COGS? | Best for | | --- | --- | --- | --- | | ROAS | Revenue ÷ Ad Spend | No | Media buyers, daily optimization | | Ad ROI | (Revenue − Ad Spend − COGS) ÷ Ad Spend × 100% | Yes | CFO, board, budget approval | | MER | Total Revenue ÷ Total Marketing Spend | No (blended) | Strategic budget decisions | ## How to Calculate Ad Spend ROI Enter your gross profit margin alongside spend, conversion rate, and order value. The calculator derives revenue and ROAS, multiplies revenue by your margin to get gross profit, subtracts ad spend to get net profit, and divides that by ad spend for your Marketing ROI %. The displayed Net Profit accounts for cost of goods, so it matches the ROI rather than contradicting it. ## Worked example: ROAS vs ROI $10,000 ad spend → $40,000 revenue at **35% gross margin**: - **ROAS** = $40,000 ÷ $10,000 = **4.0×** (looks strong) - Gross profit = $40,000 × 35% = **$14,000** - Net profit after ads = $14,000 − $10,000 = **$4,000** - **Ad ROI** = $4,000 ÷ $10,000 × 100 = **40%** Same campaign at **25% margin**: gross profit = $10,000, net profit = $0, **ROI = 0%** despite 4.0× ROAS. This is why finance asks for ROI, not ROAS. ## Benchmarks: when is ad ROI "good"? | Ad ROI % | Interpretation | Typical Context | | --- | --- | --- | | Below 0% | Losing money | Below break-even margin or overspending | | 0–20% | Thin profit | Room to optimize before scaling | | 20–50% | Healthy | Common scale zone for DTC prospecting | | 50%+ | Strong | Verify incrementality — may be attribution-inflated | Pair with break-even ROAS from the [Target ROAS Calculator](/resources/tools/calculators/target-roas-calculator.md) for a complete picture. ## Methodology & sources ROI benchmarks assume COGS is captured via gross margin input. Attribution-inflated ROAS can overstate ROI by 30–60% on duplicated conversions — cross-check with MER before board reporting. - **[FirstPageSage Marketing ROI Report](https://firstpagesage.com)** — industry ROI ranges by channel - **[WordStream & LocaliQ Benchmarks](https://www.wordstream.com/blog/ws/2022/05/19/online-advertising-benchmarks)** — ROAS baselines for ROI comparison - **[Common Thread Collective DTC Index](https://commonthreadcollective.com)** — incrementality and MER context for DTC ## When to report ROI vs ROAS to finance - **ROAS** for media buyers optimizing bids, creatives, and audiences day to day. - **ROI** for CFO, board, and annual budget reviews — profit language, not revenue language. - **MER** when attribution is unreliable and you need blended program truth. ## Common mistakes 1. **Presenting 4× ROAS to finance without margin context** — they will ask about COGS. 2. **Treating ROAS and ROI as interchangeable** in reporting — different audiences need different metrics. 3. **Ignoring returns/refunds** in revenue — net revenue lowers both ROAS and ROI. 4. **Using platform-reported revenue** without reconciling to Shopify/ERP gross sales. 5. **Scaling on ROAS while ROI compresses** — often means rising CAC or falling margin. ## How to use this calculator 1. Enter **gross profit margin** (required for ROI — this is what separates this page from basic ROAS). 2. Enter **ad spend**, **CPC**, **conversion rate**, and **order value** (or revenue directly). 3. Read **ROAS** for channel optimization and **Marketing ROI %** for profitability. 4. Compare ROI to your hurdle rate (often 20–40% for growth-stage brands). 5. Cross-check with [MER](/resources/tools/calculators/mer-calculator.md) for blended efficiency. ## How to improve ad ROI 1. Raise gross margin (pricing, COGS reduction) — improves ROI at the same ROAS. 2. Improve conversion rate — more revenue and gross profit per click. 3. Lower CAC via creative testing and audience refinement. 4. Cut spend on sub-break-even campaigns (negative ROI). 5. Run incrementality tests — reported ROI may be 30–60% lower than attributed. ## Frequently Asked Questions ### What is the difference between ROAS and ad ROI? ROAS is revenue per dollar of ad spend. ROI is profit per dollar of ad spend, as a percentage: net profit ÷ ad spend × 100, where net profit subtracts cost of goods (via gross margin) and the ad spend from revenue. A campaign can show a healthy 4.0 ROAS and still be a poor ROI once product costs are subtracted — which is exactly why finance asks for ROI, not ROAS. ### Why report ad ROI instead of just ROAS? ROAS is the right operational metric for media buyers optimizing day to day, but it is blind to margin: it treats $4 of low-margin revenue the same as $4 of high-margin revenue. ROI converts performance into the language of profit and the P&L, which is what budget owners and finance use to approve spend. ## Related Tools - [ROAS Calculator](/resources/tools/calculators/roas-calculator.md) - Calculate return on ad spend - [Target ROAS Calculator](/resources/tools/calculators/target-roas-calculator.md) - Find your break-even and profit-target ROAS - [Marketing Efficiency Ratio Calculator](/resources/tools/calculators/mer-calculator.md) - Evaluate blended marketing performance ## Get Started Ready to calculate your advertising ROI? Use our free calculator to turn spend and revenue into a CFO-ready number.