Ad ROI Calculator
This calculator turns your ad spend, click cost, conversion rate, order value, and margin into the numbers that actually decide whether a campaign makes money: clicks, conversions, revenue, CPA, ROAS, profit, ROI, and your break-even point. Use it to pressure-test a campaign before you scale it, or to see why a "positive" ROAS can still lose money. Every output is computed live from your inputs, so you can change one number and watch the rest move.
Your numbers
Results
ROAS
2.40x
Profit ROI
20%
- Estimated clicks
- 1,000
- Estimated conversions
- 30
- Revenue
- $2,400
- Cost per acquisition (CPA)
- $33.33
- Gross profit after ad spend
- $200
- Break-even ROAS
- 2.00x
Profitable: your 2.40x ROAS clears the 2.00x break-even at a 50% margin.
Estimates from your inputs. Break-even ROAS covers cost of goods only, not overhead, returns, or fees.
How to use it
- 1
Enter your planned monthly or campaign ad spend and your average cost per click (CPC). The calculator derives expected clicks from spend / CPC.
- 2
Add your landing-page or funnel conversion rate (the share of clicks that become customers) and your average order value (AOV) to get conversions and revenue.
- 3
Enter your gross margin so the tool can separate revenue from kept profit. This is what turns ROAS into a real ROI figure.
- 4
Read the outputs together: ROAS and CPA for media efficiency, and profit, ROI, and break-even ROAS for whether you actually make money.
- 5
Change one input at a time (raise conversion rate, lower CPC, adjust margin) to see what it takes to clear your break-even ROAS before you commit budget.
ROAS and ROI are not the same thing
Return on ad spend (ROAS) and return on investment (ROI) sound interchangeable, but they answer different questions. ROAS measures revenue per dollar of ad spend: ROAS = revenue / ad spend. A ROAS of 3 (often written 3x) means you brought in $3 of revenue for every $1 spent on ads. It is a top-line, gross figure and it ignores the cost of the goods or services you sold.
ROI measures profit per dollar spent, and it is margin-aware: ROI = (gross profit − ad spend) / ad spend, where gross profit = revenue × gross margin. ROI is usually expressed as a percentage. The gap between the two matters because revenue is not money you keep. If your gross margin is 40%, then $3 of revenue only contributes $1.20 toward covering the ad cost. A 3x ROAS sounds healthy, but after a 40% margin and the $1 of spend, you are roughly break-even. This is the single most common way campaigns are misread: teams celebrate ROAS while ROI is flat or negative.
Break-even ROAS: the number that tells you the truth
Break-even ROAS is the ROAS at which your campaign neither makes nor loses money on a contribution-margin basis. The formula is simple and exact: break-even ROAS = 1 / gross margin.
At a 50% margin, break-even ROAS = 1 / 0.50 = 2.0x. At a 25% margin you need 4.0x just to cover costs; at an 80% margin you break even at 1.25x. Anything above your break-even ROAS is profitable on ad spend; anything below it loses money even if the ROAS is greater than 1. This is why a 1.6x ROAS at a 50% margin is actually a loss: you are below the 2.0x break-even line. The calculator surfaces this number directly so you are comparing your ROAS against the right target, not against 1x. Note that break-even ROAS only accounts for the cost of goods captured in your gross margin. It does not include fixed overhead, shipping you absorb, returns, or platform fees beyond ad spend, so treat it as a floor, not a profit goal.
What 'good' looks like depends entirely on margin
There is no universal 'good ROAS.' A good ROAS is any ROAS comfortably above your break-even ROAS, and break-even is driven by your margin. A digital product with an 85% margin can be wildly profitable at 2x ROAS. A retailer with a 20% margin is losing money at the same 2x and needs 5x or more before profit appears.
That is why benchmarks copied from other companies are misleading: their cost structure is not yours. Instead of asking 'is 4x good,' ask three questions. First, is it above my break-even ROAS? Second, does it leave enough margin after non-COGS costs like fulfillment, returns, and overhead? Third, what is the customer worth over time? Businesses with strong repeat purchase or subscription revenue can rationally accept a near-break-even ROAS on the first order because lifetime value pays back later. If you sell one-time, you need the first sale to stand on its own. Be honest about which you are.
A worked example
Suppose you spend $2,000 on a campaign. Your average cost per click (CPC) is $1.50, your landing-page conversion rate is 3%, your average order value (AOV) is $120, and your gross margin is 60%.
Clicks = spend / CPC = $2,000 / $1.50 = 1,333 clicks. Conversions = clicks × conversion rate = 1,333 × 3% = 40 orders. Revenue = conversions × AOV = 40 × $120 = $4,800. Cost per acquisition (CPA) = spend / conversions = $2,000 / 40 = $50 per order.
Now the profitability layer. ROAS = revenue / spend = $4,800 / $2,000 = 2.4x. Break-even ROAS = 1 / 0.60 = 1.67x, so 2.4x clears the bar. Gross profit = revenue × margin = $4,800 × 60% = $2,880. Profit = gross profit − spend = $2,880 − $2,000 = $880. ROI = profit / spend = $880 / $2,000 = 44%.
This campaign works: 2.4x ROAS against a 1.67x break-even, leaving $880 of contribution profit and a 44% return. If the margin were instead 40%, break-even would jump to 2.5x, the same 2.4x ROAS would fall below it, and the campaign would post a small loss despite identical revenue. Same traffic, same sales, opposite outcome, decided entirely by margin.
FAQ
What is a good ROAS?
A good ROAS is one comfortably above your break-even ROAS, which is set by your margin. There is no universal number. At a 50% margin you break even at 2x, so 3x-4x is healthy; at a 20% margin you do not turn a profit until you pass 5x. Always compare your ROAS to your own break-even point, not to a benchmark borrowed from a business with a different cost structure.
How is ROAS different from ROI?
ROAS = revenue / ad spend and measures gross revenue per dollar spent, ignoring product costs. ROI = (gross profit − ad spend) / ad spend and measures actual profit per dollar spent, so it accounts for your margin. A campaign can show a strong ROAS and a negative ROI at the same time if the margin is thin. ROI is the figure that reflects money you keep.
What is break-even ROAS?
Break-even ROAS is the point where a campaign neither gains nor loses money on a contribution basis. It equals 1 / gross margin: 2.0x at a 50% margin, 4.0x at a 25% margin, 1.25x at an 80% margin. Below this line you lose money even when ROAS is above 1x. It excludes fixed overhead and other non-COGS costs, so treat it as a floor rather than a profit target.
Why does my profit show a loss even though ROAS is above 1?
Because ROAS above 1 only means revenue exceeded ad spend, not that you kept money. You still have to pay for the product itself. After applying your gross margin, the kept portion of revenue may be less than your ad spend. If your ROAS is below break-even ROAS (1 / margin), the calculator will show a loss. Raising margin, AOV, or conversion rate, or lowering CPC, moves you back above the line.
Are these results a guarantee of campaign performance?
No. The outputs are a projection based on the inputs you provide. Real CPC, conversion rate, and AOV vary by platform, audience, season, and creative, and the model does not include returns, shipping, platform fees, or fixed overhead. Use it to set realistic targets and compare scenarios, then validate against your actual reported numbers as the campaign runs.
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