Free ROAS Calculator – Return on Ad Spend

Return on Ad Spend Explained, Step by Step

Return on ad spend, or ROAS, answers the bluntest question in advertising: for every rupee you put into ads, how many come back as revenue? It is the headline efficiency metric for performance and e-commerce marketers because it links spend directly to sales rather than to softer signals like clicks or impressions. This calculator takes the revenue a campaign produced and the amount you spent to run it, then reports the return both as a ratio, such as 4:1, and as a percentage, such as 400 percent, so you can read it in whichever form your team prefers. The formula is ROAS = Revenue ÷ Ad Spend. Revenue is the total sales value attributed to the campaign, ad spend is everything you paid to run those ads, and the result is a multiple. A ROAS of 4 means every ₹1 of spend brought back ₹4 of revenue. Expressed as a percentage you simply multiply by a hundred, so that same 4 becomes 400 percent. Because it is a ratio rather than an absolute figure, ROAS lets you compare a tiny test campaign and a huge flagship push on equal footing, which is why it is so useful when deciding where to shift budget. Imagine a store spends ₹25,000 on a week of ads and those ads are credited with ₹1,00,000 in sales. The ROAS is 1,00,000 ÷ 25,000 = 4, or 400 percent — four rupees back for every one spent. Now suppose the product carries a 30 percent margin. The break-even ROAS is 1 ÷ 0.30 ≈ 3.33, meaning you must earn at least ₹3.33 in revenue per rupee just to cover costs. Your 4:1 result clears that bar, so the campaign is genuinely profitable, but only by a modest margin — a reminder that a healthy-looking ratio can be thinner than it first appears once product economics are included. Marketers use ROAS to rank campaigns and channels, moving money toward the placements that pay their way and pausing those that do not. Tracked over time it exposes seasonality, creative fatigue, and audience saturation, since a once-strong campaign whose ROAS slides is usually signalling that the audience has been worn out. Ad platforms even let you bid automatically toward a target ROAS, and finance teams use it to forecast the revenue a proposed budget should generate. Three concrete situations show the range. A saree seller on Instagram spends ₹18,000 and books ₹1,08,000 in orders, a 6:1 return that easily covers a 45 percent margin. A subscription app spends ₹2,00,000 to win first-month payments worth ₹1,40,000, a ROAS of 0.7 that only makes sense if those subscribers renew for a year. An electronics retailer sees a 2:1 ROAS on a ₹5,000 phone accessory and, with a 20 percent margin needing 5:1 to break even, cuts the campaign the same afternoon. The crucial caveat is that ROAS measures revenue, not profit. A 3:1 return can be excellent for a high-margin digital product yet a quiet loss-maker for a low-margin retail item once you count cost of goods, packaging, shipping, payment gateway charges, returns, and general overheads. Always compare ROAS against a break-even ROAS derived from your true margin, and be honest about attribution, since crediting the wrong sales to a campaign inflates the number. Repeat purchases from existing customers landing in a prospecting campaign's revenue column is the most common way a ROAS figure flatters itself. Treat these results as planning estimates rather than accounting-grade figures or financial advice. Every calculation runs in your browser, with guards against zero spend, so your revenue and cost numbers are never uploaded, logged, or stored anywhere.

ROAS Calculator Formula & Method

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