Enter one order
Price, product cost, commissions, shipping and your return rate.
100% free merchant tool
Work out your break-even ROAS before you scale
Enter what one order actually costs you and see the ROAS below which every extra order loses money.
Completely free
No sign-in, nothing uploaded
Break-even, target ROAS and max CPA
Your unit economics
Per order, before advertising.
01 · How to use
Three steps
Fill in one order, read the line, compare it to what you actually run at.
Read the break-even line
That is the ROAS at which an extra order earns you nothing.
Compare with your live ROAS
The gap between the two is your real headroom for scaling.
02 · Use cases
When merchants reach for it
All of these are decisions that go wrong when the break-even line is a guess.
Setting a bid or budget with confidence
GMV Max asks for a target. Picking one without knowing your break-even is how accounts spend into a loss that looks like growth.
Deciding whether a discount still works
A coupon moves price and commission at once. Re-run the numbers and see whether the promotion still leaves anything behind.
Judging a creator commission rate
An extra five points of affiliate commission can move break-even more than the ad platform ever will.
03 · FAQ
Practical questions
Answers about the model, the inputs and what it deliberately leaves out.
Why is ROAS measured on gross revenue?
Because that is how ad platforms report it: revenue divided by ad spend. Using net revenue would give you a number you cannot compare with anything in your dashboard.
Why are fixed costs excluded?
Staff, warehousing and software do not change when you sell one more unit. Spreading them across orders would move your break-even every time volume changes, which makes it useless as a bidding line.
How are returns handled?
A returned order earns no contribution and still costs you the outbound shipping, handling and any stock you cannot resell. Both effects are applied, which is why the break-even ROAS is higher than a naive margin calculation suggests.
Does anything leave my browser?
No. The calculation is arithmetic running on this page. Nothing you type is sent anywhere, and there is no account.
From the line to the trend
Knowing the line is half of it
Tec-Pulse monitors GMV Max creative fatigue, explains why performance shifts, and pinpoints the moment an ad needs a refresh — before it drifts below the line you just calculated.