Free ROAS Calculator

How to Use the ROAS Calculator

This free return on ad spend calculator needs just two numbers to start, plus three optional inputs that unlock the advanced metrics. Here is how to use it:

1. Enter your ad spend: The total amount you spent on this ad, campaign, or channel.
2. Enter your ad revenue: The revenue attributed to that ad spend. The tool instantly shows your ROAS as a ratio and a percent, plus your ACoS.
3. Add your gross margin % (optional): Revenue minus product cost (COGS), as a percent. This unlocks your break-even ROAS, gross and net profit, net margin, and ROI.
4. Add your target net margin % (optional): The profit margin you want to keep after ad spend. This unlocks your target ROAS.
5. Add a monthly revenue goal (optional): We show the ad budget needed to hit that revenue at your target ROAS.
6. Read your results: The hero number is your ROAS. The cards below show break-even ROAS, target ROAS, net profit, and the budget to hit your goal. A verdict line tells you if the campaign is profitable.

ROAS calculator results showing 3.50x return on ad spend, ACoS, break-even ROAS, target ROAS, net profit, net margin, ROI, and the ad budget to hit a revenue goal

How to Calculate ROAS by Hand

If you want to know how to calculate ROAS without a tool, it is a single division. Follow these steps:

1. Find your ad revenue: Total the revenue your ads drove over a date range. Use your ad platform or analytics attribution.
2. Find your ad spend: Total what you paid the platform over the same range.
3. Divide revenue by spend: ROAS = ad revenue / ad spend.
4. Express it two ways: As a ratio like 4.0x, and as a percent by multiplying by 100, so 4.0x is 400%.

That is the whole roas calculation. The hard part is not the math, it is judging the number against your margins, which is why this tool layers break-even and target ROAS on top.

The ROAS Formula

This is the core ROAS formula, used by every tool in this space:

$$\text{ROAS} = \frac{\text{Ad revenue}}{\text{Ad spend}}$$

To read it as a percent, multiply by 100. A ratio of 4.0x is the same as 400%.

There is also a conversion-based version of the roas equation when you do not have a single revenue figure but you do know your orders and average order value:

$$\text{ROAS} = \frac{\text{Conversions} \times \text{Average order value}}{\text{Ad spend}}$$

Both formulas give the same answer. Use whichever inputs you have on hand. In a spreadsheet, if ad revenue is in cell A1 and ad spend is in B1, your ROAS is =A1/B1.

Worked Example

Say you spent $1,000 on a Meta campaign and it drove $4,000 in revenue:

$$\text{ROAS} = \frac{4000}{1000} = 4.0\text{x} = 400\%$$

Now a fuller example with margins. You spend $4,285.71 and earn $15,000, so your ROAS is 3.50x. With a 50% gross margin, your break-even ROAS is 2.00x. If you want to keep a 15% net margin after ad spend, your target ROAS is 2.86x. Since 3.50x beats both, the campaign is profitable.

Break-Even ROAS

Your break-even ROAS is the point where ad revenue exactly covers product cost plus ad cost. Below it you lose money, above it you profit. The formula is simple:

$$\text{Break-even ROAS} = \frac{1}{\text{Gross margin}}$$

Profit at different ROAS levels chart plotting net profit against ROAS, with the break-even, target, and your current ROAS points marked on the curve

Use your gross margin as a decimal. This is why a break even roas calculator only needs your margin, not your spend. Here is how it scales:

A high-margin brand breaks even at a low ROAS. A thin-margin brand needs a much higher ROAS just to avoid losing money. Always compare your actual ROAS to this number first.

Target ROAS: Build In Your Profit Margin

Break-even keeps you at zero. Target ROAS is the ROAS you need to hit a profit goal after ad spend. It builds your desired net margin into the number:

$$\text{Target ROAS} = \frac{1}{\text{Gross margin} - \text{Target net margin}}$$

With a 50% gross margin and a 15% target net margin, your target ROAS is 1 / (0.50 - 0.15) = 2.86x. Set that figure as your target roas (tROAS) bidding goal in Google or Meta so the platform optimizes toward profitable spend, not just any conversion.

What Is a Good ROAS?

The honest answer to what is a good ROAS is: it depends on your margins. There is no single industry number that fits every store. Use this scale as a rough guide:

• Below your break-even ROAS: a loss. Every sale costs more than it earns.
• 2x to 4x: common for many ecommerce brands. Often profitable on healthy margins.
• 4x and up: strong. Comfortable profit on most DTC margins.
• 8x or higher: excellent, but may signal you are under-spending and leaving growth on the table.

By platform, DTC brands often see Meta land around 1.8x to 3.0x and Google Search around 3.5x to 6.0x, though this varies widely. The rule stays the same: compare your ROAS to your own break-even, not to an average.

ROAS vs ROI vs ACoS vs MER

These four metrics get mixed up constantly. Here is the one-line version of each:

• ROAS: ad revenue / ad spend. Revenue earned per ad dollar.
• ROI: net profit / total cost. Profit per dollar after all costs. The roas vs roi difference is that ROAS ignores product and overhead cost, so a high ROAS can still mean a low ROI on thin margins.
• ACoS: ad spend / ad revenue. The inverse of ROAS, shown as a percent. A 4x ROAS is a 25% ACoS. If you came here for an acos calculator, the cost-per-revenue-dollar card above is your ACoS.
• MER: total revenue / total ad spend, also called blended ROAS. It judges all your ad spend together instead of one campaign.

A common related metric is roas vs cpa: CPA (cost per acquisition) is spend per order, while ROAS is revenue per ad dollar. They answer different questions.

How to Improve Your ROAS

If your ROAS is below your target, a few levers move it the most:

• Raise your average order value with bundles, upsells, and free-shipping thresholds.
• Lift your conversion rate with faster pages, better product photos, and clearer offers.
• Cut the worst-performing ad sets and shift budget to your winners.
• Refresh creative before fatigue drives your costs up.

Small gains on AOV and conversion rate compound, because both raise revenue without raising ad spend.

Why ROAS Matters for Shopify Sellers

ROAS ties your ad budget directly to your product margin. Your gross margin sets a hard ceiling on how much you can pay to acquire a sale, and your break-even ROAS is that ceiling expressed as a ratio. Knowing it stops you from scaling a campaign that looks busy but loses money on every order.

Pair this with the rest of your store math. Use our Profit Margin Calculator to set the margins that feed this tool, the Break-Even Calculator to find the units and revenue you need to cover costs, and the Facebook Ads Calculator and Instagram Ads Calculator to forecast spend on each platform. This marketing roi calculator turns those margins into a clear go or no-go for your ads.

Frequently Asked Questions

What is ROAS?

Return on ad spend: the revenue you earn for every dollar spent on ads. ROAS = ad revenue / ad spend. A 4x ROAS means $4 of revenue for every $1 of ad spend.

How do I calculate ROAS?

Divide the revenue from your ads by the amount you spent on them. Example: $4,000 revenue / $1,000 spend = 4.0x (400%).

What is a good ROAS?

It depends on your margins. Many ecommerce brands aim for 4x or higher, but a high-margin brand can profit at 2x while a low-margin brand may need 8x. Compare it to your break-even ROAS, not an industry average.

What is break-even ROAS?

The ROAS where ad revenue exactly covers product cost plus ad cost, so you make no profit and no loss. Break-even ROAS = 1 / gross margin. A 50% margin needs 2.0x.

What is target ROAS?

The ROAS you need to hit a desired profit margin after ad spend. With a 50% gross margin and a 15% target net margin, your target ROAS is 1 / (0.50 - 0.15) = 2.86x.

What is the difference between ROAS and ROI?

ROAS measures revenue per ad dollar. ROI measures net profit per dollar after all costs. A campaign can have a high ROAS but low ROI if margins are thin.

What is the difference between ROAS and ACoS?

They are two sides of the same ratio. ROAS is revenue / ad spend; ACoS is ad spend / revenue. A 4x ROAS equals a 25% ACoS.

Is this ROAS calculator free?

Yes, 100% free, no signup, unlimited calculations.