Good ROAS can still leave you too little money.
Know exactly what the next order can afford to cost you. Put in your store numbers, see the gap, and find what needs to change before you raise the ad budget.
AdsMath · €49 one-time — Simulator + Decision Guide
One payment · Simulator + Decision Guide PDF
Built from 20+ years in advertising and $10M+ managed ad spend.
Meta tells you what the ads cost. Shopify tells you what came in. Before buying more orders, find out what each one leaves you.
Find your number with AdsMath · €49 →€38,440 in sales.
But only €7.64 left per order.
The customer spends about €134. Pay for the product, packing, shipping, payment fees and expected returns, and about €51 remains. That €51 still has to pay for the ad.
The ad costs €43.36 for that order. Only €7.64 remains before the store pays its regular bills. If the owner wants €15 left per order, the ad cost needs to be €36 or less. That’s the number to make the next budget decision with.
Get AdsMath and find your number · €49 →Where does the money go?
Ad reports show what you spent and what came back in sales. Follow the order one step further: what did it cost to make and deliver, and what is left after the ad?
The question: How much can you spend to get an order and still keep the amount you want?
Get AdsMath →Both get 4× ROAS.
One keeps €60. The other keeps €0.
Both spend €50 to get a €200 order. The ad report looks identical. Now subtract what it costs each store to sell and deliver that order.
Same ad result. Very different amount left. The amount left before ads must pay for getting the order and leave something for the business.
*Before fixed overhead and tax. Hypothetical first-order examples.Now find your number.
How much can your store spend to get an order?
The Decision Guide helps you gather the right numbers. Put your click cost, website conversion rate, average order, order costs and desired amount left into the Simulator. It shows what you are likely paying for an order, what you can afford, and the difference.
Try the example. Move the website conversion rate and watch the cost per order change. In the full Simulator, you can change all the numbers.
Get the Simulator + Decision Guide · €49 →The example store
What the order can afford
At 2% conversion, €1.20 clicks cost €60 per order. The target is €40.
A small example you can change. The purchased Simulator lets you enter your own store numbers.
You need to pay €20 less per order. What can change?
This store pays €60 to get an order. To keep €15 from it after ads, it can spend only €40. That’s a €20 gap.
AdsMath shows what would have to change. You decide what your store could realistically improve.
These are numbers to aim for, not promises. A few small changes might be easier than one big one.
Get AdsMath →The Decision Guide explains it. The Simulator runs your numbers.
Explore the Simulator example above and see what the Decision Guide PDF covers below. Use both to answer what the next order can afford to cost.
AdsMath Decision Guide
An illustrated PDF with worked examples and practical decision rules. Find your real order costs and see which number to check first.
AdsMath Simulator
Enter your click cost, conversion rate, order value, order costs and desired amount left. See your current cost per order, your limit and what needs to change.
Simulator + Decision Guide PDF. €49 once.
Get the Simulator + Decision Guide →Use it with your numbers open.
The Simulator example above lets you change a few numbers. The Decision Guide PDF connects order economics, target CPA and practical decisions. Use these examples to follow the math.
What does a €300 order leave before ads?
Subtract product cost, shipping, fulfillment, payment fees and expected returns. In this example, €180 remains before acquisition.
How far is acquisition from your target?
A €100 modeled CPA against an €80 target leaves a €20 gap, even though the order still contributes after ads.
Which change is worth testing first?
Check whether a change is achievable, what else it might affect, and how you will measure the result.
These examples show the first-order math behind the Decision Guide. The interactive example above uses the same inputs as the full Simulator.
Open it with your store numbers. Leave knowing what to do next.
Get the numbers
The Decision Guide shows which costs to include: product, packing, shipping, fees and expected returns.
See your target
Put the numbers into the Simulator. See what an order costs you now and what it can afford to cost.
Move the levers
Try cheaper traffic, a better converting site, a bigger order or lower order costs. See how much each change helps.
Choose the next test
Pick one thing to check or test first.
What can you pay for the next order?
If you’re paying to acquire e-commerce customers and cannot answer that question while keeping the profit you want, AdsMath was built for you. If answering takes Meta, Shopify and a spreadsheet open at once, start here.
Your ads may be fine. Or the site may need to convert better. Or the order may leave too little after costs. AdsMath helps you see which question to tackle next.
Built by someone who actually runs the ads.
“The account looks healthy. Then we ask what the store kept from the sale.”
I’m Florian Coman. I’ve worked in advertising since 2001 and been hands-on with Meta and Google since around 2013. I’ve managed more than $10M in ad spend across e-commerce, lead generation and digital products, including accounts spending six figures a month.
I kept seeing the same problem: a good ROAS, a reasonable cost per purchase, and pressure to scale. Then we counted what it actually cost to sell and deliver each order. AdsMath puts those numbers together so you can make the next call with your eyes open.
Know what you can actually afford to pay for a customer.
AdsMath costs €49. If it stops you from buying one unprofitable €50 customer, it has already paid for itself. The point is not another metric. It is knowing your allowable acquisition cost before you spend the next euro.
What this tool can tell you.
AdsMath looks at the first order: what the customer paid, what that order cost, what you spent on ads, and what remains. It doesn’t predict tomorrow’s campaigns or settle which platform deserves credit for a sale. Rent, salaries and tax still need to be paid from what remains.
Use your best current numbers. You can see every assumption and change it.
Before you buy more customers, know what one can cost.
The next budget change should not depend on a ROAS benchmark you found online. Enter your own numbers. See what an order can afford to cost, where you stand today, and what needs to change.
- Model your real cost per order
- Set a target based on what you want left
- Test traffic, conversion, order value and margin
- Leave with a specific next decision
Know what you can actually afford to pay for a customer.
Includes AdsMath Simulator + AdsMath Decision Guide.
One payment. No subscription. Instant access.
One payment · Immediate access · Lifetime license
