Your ROAS can look great while you’re still making too little money.
AdsMath reveals what your acquisition economics can support, which number is holding you back, and what to test before you increase the budget.
in seconds
Same ROAS.
Completely different profit.
Both stores have a 2.3× ROAS. One has room to grow. The other loses money on each acquired order. ROAS alone doesn’t tell you whether the ads make financial sense.
See how the numbers work →Advertising is a magnifier.
Ads Don’t Fix Weak Math.
A better campaign can improve a viable offer. It cannot create room that the business economics do not contain. Start with what a sale leaves, then find the gap before asking the ads to do more.
Find the constraint before you raise the budget.
Connect ad spend, click cost, conversion rate, order value and margin. See your first-order break-even and target ad cost, then turn a dial to see what changes across the model.
Try the preview ↓Four dials.
One connected result.
What would it take to reach your target if one input changed and the others held steady? These thresholds follow the preview above. The full calculator pairs them with more detailed test ideas and trade-offs.
Clicks cost too much?
Investigate creative, traffic quality, audiences and auction pressure. Cheaper traffic is only useful if it still converts.
Visitors don’t buy?
Test the offer, proof, page clarity, ad-to-page match and buying friction. Measure the actual lift before spending against it.
Orders are too small?
Try useful bundles, quantity options or relevant add-ons. Check whether conversion and margin still hold.
Too little remains?
Review price, fulfilment, returns, product cost and discounting. More revenue alone may leave less behind.
One-input thresholds are modeled alternatives, not a diagnosis of why a metric is low or a promise that an improvement is achievable. Paid new-customer CAC requires distinct new customers and matching acquisition costs.
Could you build this in Excel or ask AI? Yes.
The formulas are straightforward. You can build and check them yourself. AdsMath gives you the connected model, the target thresholds, margin helper, what-if comparison and practical guidance in one ready-to-use workflow.
It grew out of real conversations about ad accounts where the deciding number often sat elsewhere in the business. Enter your own assumptions, see the gap and choose a change worth testing.
It started with a Google Sheet.
I’ve used this sheet in hundreds of calls to show how ad spend, CPC, conversion rate, order value and margin work together. We’d change one number and see what happened to the rest. The reaction I heard many times:
“No one has ever explained it this way.”
AdsMath grew from that sheet. A downloadable version is included with your calculator.
The calculator + a practical Decision Guide.
Everything you need to turn the numbers into a better acquisition decision.
AdsMath Calculator
Interactive tool to calculate your break-even and target CAC with your own inputs.
Decision Guide
better decisions about ads.
Practical Decision Guide
Worked examples, explanations and decision rules included with the calculator.
I’m Florian Coman.
I’ve worked in advertising since 2001 and have been hands-on with Meta and Google Ads since 2013. I’ve managed acquisition across e-commerce, lead generation and digital products—from smaller stores to accounts spending six figures per month.
I first used this model on calls with founders who thought they had an ad-account problem. As we entered spend, click cost, conversion, order value and margin together, the conversation changed. We could see which assumption had to move for acquisition to make sense.
AdsMath grew from that working spreadsheet. The point is to make the next decision more precise, while keeping the assumptions visible and open to challenge.
Before you buy.
Can I use AdsMath outside e-commerce?
Yes, with inputs that describe an acquired customer. In lead generation, for example, paid click-to-lead rate × lead-to-customer rate gives a click-to-customer rate. Use first-sale customer value and contribution in the first-order model. AdsMath does not separately model every lead or sales stage.
Will it tell me what to improve?
It shows the CPC, conversion rate, order value or margin required to meet your chosen target when one changes at a time. Tips suggest practical tests and trade-offs. Your business data decides which change is realistic; the calculator cannot identify the cause of a low conversion rate by itself.
How do I calculate contribution margin before ads?
The full calculator includes a margin helper for relevant variable costs, such as product or delivery costs, shipping and returns. Its thresholds update from the margin you enter.
What about customers who buy again?
The calculator shows first-order economics. If you plan to spend above first-order break-even because customers buy again, validate that later contribution and the time to payback with actual customer cohorts.
Does it connect to my ad accounts or store?
No. Enter your numbers to model scenarios and compare decisions. It does not import live campaign or store data.
Is it a subscription?
No. It is €49 once, VAT included, with the calculator and Decision Guide included.
A small improvement in your numbers can easily be worth €49.
If you spend €5,000 a month acquiring customers, reducing CAC by 1% at the same volume saves about €50 that month. AdsMath costs €49 once. Catching an unprofitable acquisition before you scale it can be worth much more.
More profit.
Get AdsMath and make better decisions with your ad budget.
Interactive calculator + 20-page Decision Guide.
€49 one-time payment. Instant access.
