ROAS Calculator (Return on Ad Spend)

What is ROAS and why it matters for dropshipping

ROAS (Return on Ad Spend) is the ratio of revenue generated from ads to the amount spent on those ads. If you spend $100 on Facebook ads and generate $400 in revenue, your ROAS is 4x (or 400%). It is the most-tracked metric in performance marketing — but also the most misunderstood. Most dropshippers track ROAS without knowing their break-even ROAS, which means they cannot tell whether a 3x ROAS is making them rich or losing them money.

This guide explains the ROAS formula, what constitutes a good ROAS in 2026, how ROAS varies by platform and niche, and the critical distinction between ROAS, break-even ROAS, and POAS (Profit on Ad Spend). By the end, you will know exactly how to interpret the ROAS number your ad manager shows you.

The ROAS formula

ROAS = Revenue from Ads ÷ Ad Spend

The formula is deceptively simple. The complexity is in what counts as revenue from ads and what counts as ad spend. Revenue from ads should include only revenue directly attributable to your ad campaigns — not organic sales, email sales, or direct traffic. Ad spend should include all costs associated with the campaign: media spend, creative production costs, agency fees, and any tool subscriptions directly tied to the campaign.

Most ad platforms (Facebook, TikTok, Google) report ROAS automatically based on their attribution windows. Facebook defaults to 7-day click + 1-day view attribution. This means Facebook counts a purchase as from ads if the customer clicked your ad and purchased within 7 days, or saw your ad and purchased within 1 day. If your customers typically take 10+ days to purchase (common for higher-priced products), Facebook's ROAS will underreport your actual ROAS by 20-40%.

Worked example: $400 revenue from $100 ad spend

Let's say you run a Facebook ad campaign for your $39.99 LED sunset lamp. Over 7 days, you spend $100 on ads and generate 10 orders totaling $399.90 in revenue. Your ROAS = $399.90 ÷ $100 = 4.0x (or 400%). This means for every $1 you spend on ads, you generate $4 in revenue.

But is this profitable? That depends on your break-even ROAS. If your product costs $8.50, shipping is $3.95, transaction fees are $1.46, and other costs are $1.00, your non-ad costs total $14.91 per order. Your break-even ROAS = $39.99 ÷ ($39.99 − $14.91) = 1.59x. Since your actual ROAS (4.0x) is well above your BEROAS (1.59x), you are highly profitable — net profit per order is $25.08 − $10.00 ad cost = $15.08, which is a 37.7% net margin.

What is a good ROAS? (2026 benchmarks)

The 4x is good rule of thumb is misleading because it ignores your margin. Here are the 2026 benchmarks by platform: Facebook/Instagram typical break-even ROAS is 1.8-2.5x, good ROAS is 2.5-4x, strong is 4x+. TikTok break-even is 2.0-3.0x, good is 3-5x. Google Search break-even is 1.5-2.5x, good is 3-5x. Pinterest break-even is 1.5-2.5x, good is 3-5x. Google Search typically has the highest ROAS because search intent is highest — people searching buy sunset lamp are at the bottom of the funnel.

ROAS vs ROI vs POAS — the modern framework

ROAS has a major limitation: it only considers ad spend, not product cost, shipping, or fees. A 4x ROAS on a product with 80% gross margin is highly profitable. A 4x ROAS on a product with 25% gross margin is losing money. This is why modern e-commerce teams track three metrics: ROAS for ad platform optimization, BEROAS (Break-Even ROAS) for kill/scale decisions, and POAS (Profit on Ad Spend) for true profitability tracking. POAS = Net Profit ÷ Ad Spend. A 1.5x POAS means $1.50 profit per $1 ad spend.

Tools like Triple Whale and Northbeam calculate POAS automatically by syncing ad spend with Shopify order data. If you are doing $50K+/month in ad spend, a third-party attribution tool is worth the investment.

How to improve your ROAS

1. Improve your creative — Creative is 70-80% of ad performance. Test 5-10 new creatives per week. Kill any creative with CTR below 1% after $50 spend.
2. Tighten your audience — Broad targeting works on Facebook, but narrower interest stacks work better on TikTok and Google.
3. Improve your landing page — A faster, higher-converting product page means more orders from the same ad clicks. Every 0.5% CVR improvement typically lifts ROAS 25-30%.
4. Use retargeting — Retargeting ROAS is 2-3x cold-traffic ROAS for the same product. Build a retargeting funnel before scaling cold.
5. Negotiate supplier cost down — Lower cost = higher margin = lower BEROAS = easier to scale profitably.
6. Raise your price — Higher AOV = higher revenue per click = higher ROAS. Test $5 increments.

A campaign stuck at 1.8x ROAS can usually be pushed to 3x+ by working levers 1, 3, and 4 together. This is the difference between a campaign you have to kill and one you can scale to seven figures.

Common ROAS mistakes

The first mistake is comparing ROAS to a flat 4x is good benchmark without calculating your break-even ROAS. A 3x ROAS might be losing you money on a low-margin product, while a 2x ROAS might be highly profitable on a high-margin one. Always compare actual ROAS to your BEROAS, not to an industry average.

The second mistake is trusting platform-reported ROAS without understanding attribution windows. Facebook's 7-day click + 1-day view attribution will underreport ROAS for products with longer consideration cycles. Use a third-party attribution tool with longer windows for accurate cross-platform ROAS.

The third mistake is not separating cold-traffic ROAS from retargeting ROAS. Retargeting always has higher ROAS (2-3x) because the audience is warmer. If you blend them, your cold-traffic ROAS looks better than it actually is, and you may scale a campaign that is unprofitable on cold traffic alone.

Use the ROAS Calculator

Our free ROAS Calculator above does the math in seconds. Enter your revenue from ads and ad spend — the calculator returns your ROAS ratio, ROAS percentage, ad profit, and revenue per dollar of ads. Pair it with our Break-Even ROAS Calculator to know your kill/scale threshold, and our Profit Margin Calculator to verify your net margin.