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About this tool
Calculate Customer Acquisition Cost across marketing channels, compare channel efficiency, and track LTV:CAC ratio in real time.
The CAC Calculator works out Customer Acquisition Cost channel by channel — CAC = spend ÷ customers acquired — and then a blended CAC from total spend ÷ total customers across every channel you list. Enter your average customer lifetime value and it grades the LTV:CAC ratio against the standard 3:1 benchmark, ranks channels from cheapest to most expensive, and shows the spend gap between your best and worst performer. Figures are in rupees, and everything stays in the browser.
Open CAC Calculator on AltFTool — it loads instantly in your browser.
Fill in the Marketing Channels table — five channels are pre-filled — typing each one's Spend (₹) and Customers, or use the 'Add New Channel' row and its 'Add' button to bring in another. 'Load Sample Data' swaps in a seven-channel example.
Everything recalculates as you type: each row shows that channel's CAC and Spend Share, BEST and HIGH badges mark the cheapest and most expensive, and the 'Channel Efficiency Ranking' table sorts every channel from lowest CAC upward.
Enter 'Your Average LTV (₹)' to grade the LTV:CAC Ratio card against the 3:1 benchmark, then use 'Copy' for a plain-text summary or 'CSV' to download cac-calculator.csv.
One channel at ₹1,500 hidden inside a ₹420 blended average is exactly the problem this surfaces, with BEST and HIGH badges on the outliers.
Each channel shows what percentage of total budget it consumes next to its CAC, so an efficient channel starved of budget is easy to spot.
Copy a plain-text summary or download a CSV with every channel's spend, customers, CAC and spend share plus the blended totals and LTV:CAC ratio.
Per channel it is marketing spend ÷ customers acquired from that channel, and blended CAC is total spend across all channels ÷ total customers. So ₹50,000 on Google Ads producing 120 customers is a CAC of ₹417, while the same ₹50,000 producing 250 customers is ₹200.
3:1 or higher is the widely used benchmark and is graded Excellent here. The tool bands 2–3x as Good, 1–2x as Needs Work because you are barely breaking even on acquisition, and anything below 1x as Unsustainable — you lose money on every customer.
The efficiency labels here use rupee bands: up to ₹200 is Very Efficient, up to ₹500 Efficient, up to ₹1,000 Average, up to ₹2,000 Above Average, and above ₹2,000 High Cost. These are rough guides only — the real test is your LTV:CAC ratio, since a ₹5,000 CAC is fine against a ₹25,000 lifetime value.
That depends on which definition you want. Paid-media-only CAC uses ad spend and is useful for comparing channels; fully loaded CAC adds marketing salaries, agency retainers and tooling, and is the figure investors usually mean. Pick one definition and apply it to every channel so the comparison stays honest.
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