ROAS Calculator
Calculate return on ad spend, your break-even ROAS from gross margin, target CPA and real profit after ad costs.
- →Use contribution margin (after shipping, fees and returns) for a realistic break-even ROAS.
- →Compare platform-reported ROAS with blended ROAS across all channels to spot over-attribution.
- →Raising average order value with bundles lifts ROAS without touching ad costs.
- →For subscription or repeat-purchase products, judge CPA against lifetime value, not just the first order.
This tool is for informational purposes only. Always verify results with a qualified professional.
What is the ROAS Calculator?
The ROAS Calculator tells you how much revenue each unit of ad spend brings back, and — more importantly — whether that return is actually profitable once product costs are taken into account. Enter the revenue attributed to your campaign, what you spent on ads, your gross margin and (optionally) the number of conversions, and the tool returns your ROAS, the break-even ROAS for your margin, the profit left after ad spend, your actual cost per acquisition and the maximum CPA you can afford.
Return on ad spend is calculated as revenue ÷ ad spend. A ROAS of 4 (often written 4x or 400%) means every $1 of advertising generated $4 in sales. The trap is that ROAS measures revenue, not profit. A store selling products at a 25% gross margin keeps only $0.25 of every revenue dollar to pay for advertising, so it needs a ROAS of at least 4x just to break even. A software business with an 80% margin breaks even at 1.25x. That is why the same 3x ROAS can be a great result for one company and a money-losing one for another.
Break-even ROAS is 1 ÷ gross margin (as a decimal). Gross margin here means revenue minus the direct cost of delivering the order — product cost, shipping, payment fees and fulfilment — divided by revenue. If you use a contribution margin that also deducts returns and transaction fees, the result is even more accurate. The calculator compares your ROAS with this threshold and labels the campaign profitable, break-even (within ±2%) or losing, so you know at a glance whether to scale, optimise or pause.
Worked example: an online shop spends $3,000 on Meta ads in a month and the campaign drives 150 orders worth $12,000. ROAS = 12,000 ÷ 3,000 = 4.0x. With a 40% gross margin, break-even ROAS = 1 ÷ 0.40 = 2.5x, so the campaign is comfortably profitable. Gross profit is 12,000 × 0.40 = $4,800, leaving $1,800 after ad spend. The actual CPA is 3,000 ÷ 150 = $20, while the average order value is $80, so the break-even (target) CPA is 80 × 0.40 = $32 — the shop could pay up to $12 more per customer before losing money on the first order.
Keep attribution in mind when you read the numbers. Platform-reported ROAS (Meta, Google, TikTok) usually counts view-through and multi-touch conversions and can overstate results, while last-click analytics can understate them. Many marketers track a blended ROAS — total revenue ÷ total ad spend across all channels — alongside platform ROAS. If you sell subscriptions or repeat-purchase products, also compare your CPA against customer lifetime value rather than first-order value, because a campaign that only breaks even on day one can still be very profitable over 12 months.
How to Use This Calculator
- 1Pick your currency symbol so every money result is labelled correctly.
- 2Enter the revenue attributed to the campaign and the total ad spend for the same period.
- 3Enter your gross margin percentage (revenue minus product, shipping and fulfilment costs, divided by revenue).
- 4Optionally add the number of conversions or orders to unlock actual CPA, average order value and target CPA.
- 5Click Calculate ROAS to see your ROAS, break-even ROAS and profit after ad spend.
- 6Check the colored verdict and gauge — green means scale, amber means optimise, red means fix or pause.