Finance Calculator
ROAS Calculator
Work out return on ad spend as a multiple, a ratio and a percentage. Enter what a campaign cost and what it earned to get ROAS with a step-by-step breakdown — and add your gross margin to see the breakeven the headline number hides.
ROAS Calculator
Return on ad spend, as a ratio and a percentage
Total spent on advertising
Or total conversion value
Reveals true breakeven after cost of goods
Results
ROAS
4.50×
4.5:1 · Strong
Profit from Ads
$3,500
450.00% of spend returned
Strong — 4.50×
A healthy return by most standards, and a common target for ecommerce campaigns.
Where This Sits
Breakeven ROAS by Gross Margin
Same Revenue at Other Spend Levels
Profit here is revenue minus ad spend only — it does not subtract the cost of the goods sold. Enter your gross margin to see whether 4.50x actually clears breakeven.
Every $1 of ad spend returned $4.50 of revenue, and ad spend was 22.2% of revenue.
ROAS is measured on revenue, not profit. That is what makes it comparable between campaigns, and also why it overstates how well a low-margin business is doing.
Attribution decides this number. A longer lookback window, view-through conversions or a different attribution model can move ROAS substantially without anything changing in the campaign itself.
Step-by-Step Calculation
Step 1 — ROAS
ROAS = Revenue ÷ Ad Spend
ROAS = $4,500 ÷ $1,000 = 4.50
Expressed as a ratio: 4.5:1
Step 2 — ROAS as a percentage
ROAS % = (Revenue ÷ Ad Spend) × 100
ROAS % = ($4,500 ÷ $1,000) × 100 = 450.00%
Step 3 — Profit from ads
Profit = Revenue − Ad Spend
Profit = $4,500 − $1,000 = $3,500
Understanding ROAS
Return on ad spend is revenue divided by advertising cost. Spend $1,000, generate $4,500, and your ROAS is 4.5 — written 4.5× or 4.5:1, and equivalent to 450%. All three say the same thing: $4.50 of revenue came back for every $1 spent.
Its strength is comparability. Because it is a simple ratio, it works across channels, campaigns and time periods without adjustment, which is why every ad platform reports it.
Its weakness follows from the same fact. ROAS is measured on revenue, not profit, so it says nothing about what the goods cost you. That gap is where most ROAS mistakes live, and it is what the gross margin field on this calculator exists to close.
ROAS Formulas
1. ROAS
2. ROAS as a Percentage
3. Profit from Ads
4. Breakeven ROAS
Why a 2× ROAS Can Mean Zero Profit
Example 3 is the case worth studying. Ad spend $800, revenue $1,600, ROAS 2.0×. The profit line reads $800, which looks like a campaign worth scaling.
Now add a 50% gross margin. That $1,600 of revenue carries $800 of cost of goods, leaving $800 of gross profit — which the $800 of ad spend consumes entirely. The campaign nets exactly zero.
This is not an edge case. Breakeven ROAS is simply 1 ÷ gross margin, and at a 50% margin that is 2.0× — precisely where this campaign sits. Below your breakeven, a positive-looking ROAS is still a loss:
| Gross Margin | Breakeven ROAS | Gross Profit | Net After Ad Spend |
|---|---|---|---|
| 30% | 3.33× | $480 | −$320 |
| 40% | 2.50× | $640 | −$160 |
| 50% | 2.00× | $800 | $0 |
| 60% | 1.67× | $960 | +$160 |
| 80% | 1.25× | $1,280 | +$480 |
The campaign never changes — same spend, same revenue, same 2.0× ROAS in every row. Only the margin moves, and it decides whether the campaign makes $480 or loses $320. Even Example 1's impressive 4.5× loses $100 at a 20% margin, where breakeven is 5.0×.
Your Breakeven ROAS
This is the single most useful number in ad measurement, and it takes one division. Find your gross margin, and the ROAS you must beat:
| Gross Margin | Breakeven ROAS | Typical Of |
|---|---|---|
| 20% | 5.00× | Electronics, grocery, resale |
| 30% | 3.33× | General retail |
| 40% | 2.50× | Apparel, home goods |
| 50% | 2.00× | Cosmetics, supplements |
| 60% | 1.67× | Premium brands, services |
| 70% | 1.43× | Digital products, SaaS |
| 80% | 1.25× | Software, courses |
A low-margin business needs a ROAS four times higher than a software business just to stand still. This is why a single "good ROAS" benchmark passed between industries does more harm than good.
ROAS, ROI and ACoS
Three names for the same underlying ratio, which causes endless confusion in reporting:
| ROAS | As Percentage | ROI | ACoS |
|---|---|---|---|
| 4.50× | 450.00% | 350.00% | 22.22% |
| 3.00× | 300.00% | 200.00% | 33.33% |
| 2.00× | 200.00% | 100.00% | 50.00% |
ROI = (ROAS − 1) × 100. ROAS counts the returned spend in the total; ROI counts only the gain above it. A 3.0× ROAS and a 200% ROI describe an identical campaign.
ACoS = 100 ÷ ROAS. Advertising cost of sale is the reciprocal — ad spend as a share of revenue. Amazon sellers use ACoS; Google and Meta advertisers use ROAS. Lower ACoS is better; higher ROAS is better.
Why Scaling Lowers ROAS
Holding Example 1's $4,500 of revenue fixed, the spend alone determines the ratio:
| Ad Spend | ROAS | Profit on Revenue |
|---|---|---|
| $500 | 9.00× | $4,000 |
| $750 | 6.00× | $3,750 |
| $1,000 (entered) | 4.50× | $3,500 |
| $1,250 | 3.60× | $3,250 |
| $1,500 | 3.00× | $3,000 |
In reality extra spend buys some extra revenue, but at a worsening rate — the cheapest and most responsive audience gets reached first. A falling ROAS while scaling is normal and not by itself a problem, provided you stay above breakeven. Total profit, not peak ROAS, is usually the thing to maximise.
Interpreting the Number
| ROAS | Band | What It Means |
|---|---|---|
| Under 1× | Losing Money | Revenue is below spend, before cost of goods is even counted |
| 1–2× | Breaking Even | Clears spend on revenue; most products still lose after cost of goods |
| 2–3× | Modest | Workable for high-margin products, thin for everyone else |
| 3–5× | Strong | A healthy return and a common ecommerce target |
| Above 5× | Excellent | Very strong — check attribution, and whether more spend fits |
Treat these as conventions only. The threshold that actually matters is your own breakeven, which no generic benchmark can tell you.
Benefits of Using the ROAS Calculator
Example Calculations
Three campaigns worked through step by step:
Example Scenario 1 — A Strong Campaign
Ad spend $1,000, revenue $4,500.
ROAS = Revenue ÷ Ad Spend
ROAS = $4,500 ÷ $1,000 = 4.5 (or 4.5:1)
ROAS % = ($4,500 ÷ $1,000) × 100 = 450%
Profit = $4,500 − $1,000 = $3,500
Every $1 spent returned $4.50 of revenue; ad spend was 22.2% of revenue
Result: 4.5× — Strong, though at a 20% gross margin it would still lose $100
Example Scenario 2 — A Solid 3:1
Ad spend $2,500, revenue $7,500.
ROAS = $7,500 ÷ $2,500 = 3.0 (or 3:1)
ROAS % = 300%
Profit = $7,500 − $2,500 = $5,000
Ad spend was 33.3% of revenue
The same result framed as ROI: (3.0 − 1) × 100 = 200%
Result: 3.0× — Strong, and profitable at any margin above 33.3%
Example Scenario 3 — Where ROAS Misleads
Ad spend $800, revenue $1,600, gross margin 50%.
ROAS = $1,600 ÷ $800 = 2.0 (or 2:1)
Profit on revenue = $1,600 − $800 = $800
But gross profit = $1,600 × 50% = $800
Net after ad spend = $800 − $800 = $0
Breakeven ROAS = 1 ÷ 50% = 2.0 — exactly where this campaign sits
Result: 2.0× looks like $800 of profit but actually breaks even
What ROAS Does Not Tell You
The formula contains two numbers, so everything else is excluded: cost of goods, shipping, payment processing, returns, staff time and overheads. It also assumes the revenue figure is correct, and attribution is where that assumption usually breaks — each platform claims the conversions it believes it caused, using its own lookback window, so the same sale is frequently counted twice and platform-reported ROAS tends to sum to more revenue than the business actually earned. Nor does it capture customer lifetime value: a campaign that looks marginal on first purchase may be excellent once repeat orders are counted, which is why subscription businesses tolerate a ROAS that would alarm a one-off retailer. And no version of this number can tell you whether those customers would have bought anyway. Compare against your own breakeven, not an industry benchmark. This is general information, not financial advice.
Frequently Asked Questions
- What is ROAS?
- Return on ad spend is the revenue a campaign generated divided by what it cost. Spending $1,000 to produce $4,500 of revenue gives a ROAS of 4.5, usually written 4.5× or 4.5:1. It answers one question: how much revenue did each advertising dollar bring back?
- How do you calculate ROAS?
- Divide revenue by ad spend. $4,500 ÷ $1,000 = 4.5. To express it as a percentage, multiply by 100, giving 450%. The ratio form, 4.5:1, says the same thing — $4.50 of revenue for every $1 spent.
- What is a good ROAS?
- The only universally correct answer is "above your breakeven," which depends on your gross margin. As a rough convention, under 1× loses money outright, 1–2× is breaking even, 2–3× is modest, 3–5× is strong and above 5× is excellent. A 4× ROAS is excellent for a 70% margin business and a disaster for one running at 20%.
- What is breakeven ROAS?
- Breakeven ROAS = 1 ÷ your gross margin. At a 50% margin you need 2.0× just to cover the cost of goods plus the ad spend. At 25% you need 4.0×, and at 80% only 1.25×. Below that number the campaign loses money no matter how healthy the ROAS looks.
- Is ROAS the same as profit?
- No, and this is the most common misreading. ROAS is measured on revenue, so it ignores what the goods cost you. A 2.0× campaign on a 50% margin product nets exactly zero — the $800 of apparent profit is entirely consumed by cost of goods. Always check ROAS against your breakeven.
- What is the difference between ROAS and ROI?
- They are the same measurement framed differently. ROI as a percentage is (ROAS − 1) × 100, so a 3.0× ROAS is a 200% ROI. ROAS counts the returned spend; ROI counts only the gain above it. Neither subtracts cost of goods unless you do it yourself.
- What is ACoS and how does it relate?
- Advertising cost of sale is ad spend as a percentage of revenue — the reciprocal of ROAS. A 4.5× ROAS is a 22.2% ACoS, and 2.0× is 50%. Amazon sellers tend to use ACoS; Google and Meta advertisers tend to use ROAS. They carry identical information.
- Does spending more lower my ROAS?
- Usually, because the cheapest, most responsive audience is reached first. Holding $4,500 of revenue fixed, spending $500 would be 9.0× while $1,500 would be 3.0×. In practice extra spend brings some extra revenue, but typically at a worse rate — which is why scaling campaigns almost always means accepting a lower ROAS.
- Why does my ROAS differ between platforms?
- Attribution. Each platform claims the conversions it believes it caused, using its own lookback window and model, so the same sale can be counted by two platforms at once. Platform-reported ROAS almost always sums to more revenue than the business actually earned.
- What does ROAS leave out?
- Cost of goods, shipping, payment processing, returns, staff time and overheads — none are in the formula. It also ignores customer lifetime value, so a campaign that looks marginal on first purchase may be excellent once repeat orders are counted. And it cannot tell you whether those sales would have happened anyway.