Find the minimum ROAS your ads need to cover product costs, shipping and transaction fees — plus your maximum CPA and profit at different return levels.
What return does every $1 of ad spend have to produce before I lose money?
Ecommerce unit economics
Know what you actually keep.
Free ecommerce calculators for profit, pricing, advertising and break-even decisions.
- Free
- No signup
- Instant calculations
- Privacy-friendly
One $80 order
Product cost$25.00 31.3%
Shipping & fulfilment$8.00 10.0%
Percentage fees$2.40 3.0%
Fixed transaction fee$0.30 0.4%
Expected returns/refund loss$3.00 3.8%
Other variable cost$2.00 2.5%
Advertising / CPA$20.00 25.0%
Net profit$19.30 24.1%
Net profit per order$19.30
At 4.00x actual ROAS, this order keeps $19.30 after the full variable cost stack — a 24.1% net margin. Break-even sits at 2.04x.
Calculators
Each tool takes the costs you already know and returns the number you need to make a decision. No accounts, no exports, no waiting.
Break one order down into revenue, costs and the profit you keep, including ad spend and refunds.
What do I actually keep from this order?
Shopify Profit Calculator
Coming soonOrder profit with Shopify plan, Shopify Payments and third-party gateway fees modelled explicitly.
What does an order leave behind after Shopify takes its cut?
Ecommerce Break-Even Calculator
Coming soonHow many orders a month cover your fixed costs at your current contribution per order.
How many orders do I need before the store makes money?
Shopify Break-Even Calculator
Coming soonBreak-even order volume with Shopify subscription, app and transaction costs treated as fixed and variable separately.
What volume does my Shopify stack need to pay for itself?
Browse by decision
Categories group the calculators by the question they answer, not by the software you happen to run.
Profit Calculators
Work out what an order actually leaves behind after every cost.
3 tools planned or live
Advertising Calculators
Turn your unit economics into the ad numbers you can actually spend to.
1 tools planned or live
Break-Even Calculators
Find the point where an order, a campaign or a product stops losing money.
3 tools planned or live
Pricing Calculators
Set prices from margin targets instead of guesswork.
2 tools planned or live
Platform Fee Calculators
Model Shopify, payment processor and marketplace fees on a real order.
3 tools planned or live
Learn ecommerce unit economics
Short, practical guides behind the numbers the calculators produce. Every example is computed with the same engine as the tools.
What Is Break-Even ROAS?
The definition, the formula and how each cost line changes the number you have to beat.
Break-Even ROAS vs Target ROAS
One number keeps you from losing money, the other earns you some. Where each belongs.
How to Calculate Your Maximum CPA
The acquisition ceiling in currency rather than as a ratio — and why buyers often prefer it.
How to Calculate Ecommerce Profit
The full per-order cost stack, the order of subtraction and the difference between contribution and net profit.
Why contribution, not revenue
Revenue tells you what came in. Contribution tells you what is left once the product, the shipping and the payment processor have taken their share — and that leftover is the only money advertising can be paid from. Every calculator here starts from the same place, which is why the numbers agree with each other.
The formulas, the assumptions behind them and the review dates are published in the methodology.