Break-even ROAS calculator
Find out how much you can pay for a sale or a click without losing money.
≈ 2 minutes
Calculate my break-even ROAS
Guides
The calculators give you figures; these guides explain where they come from and what to do with them. No filler, formulas in the open.
All the guides
Guide
How to calculate ecommerce profitability
From gross revenue to real profit: tax, product, logistics, gateways, advertising, returns and fixed costs.Calculator: Break-even ROAS calculatorReviewed on August 21, 2026Read the guide →GuideROAS, ACoS, CPA and CPC: differences and formulas
Four metrics measuring the same thing from different angles, with the formulas, the conversions and the usual mistakes.Calculator: Break-even ROAS calculatorReviewed on August 21, 2026Read the guide →GuideThe real cost of returns in ecommerce
The lost sale, reverse logistics, the fees that do not come back and the provision you should be setting aside per order.Calculator: Cost of returns calculatorReviewed on September 12, 2026Read the guide →GuideEtsy fees by country: a comparison
The fees Etsy applies to an order, what base each one uses, and how they differ across the eight markets.Calculator: Etsy profit calculatorReviewed on August 21, 2026Read the guide →GuideAmazon FBA fees by market: a comparison
Selling plans per marketplace, referral fee, fulfillment fee, storage, inbound shipping and advertising.Calculator: Amazon FBA profit calculatorReviewed on August 21, 2026Read the guide →GuideCompare sales channels: own store, Amazon and Etsy
You sell the same product in more than one place and you are not sure which one actually pays you.Calculator: Sales channel profitability comparisonReviewed on September 12, 2026Read the guide →GuideHow to plan ecommerce inventory
You buy stock on instinct and you alternate between running out and filling the warehouse with what will not sell.Calculator: Safety stock calculatorReviewed on September 12, 2026Read the guide →GuideCAC, payback and margin: how much to spend
You spend on advertising, you see a ROAS that looks fine, and you cannot tell whether the business is getting better or worse.Calculator: Contribution margin calculatorReviewed on September 12, 2026Read the guide →GuideNegotiate MOQ without straining cash flow
Your supplier is asking for a minimum order that looks large and you cannot tell whether to accept it, negotiate it or walk away.Calculator: MOQ profitability calculatorReviewed on September 12, 2026Read the guide →The calculators
Cost of returns calculator
Work out how much returns cut from your monthly profit.
≈ 3 minutes
Calculate my cost of returns
Etsy profit calculator
Strip out the fees, the tax, the materials, the shipping and the ads.
≈ 4 minutes
Calculate my Etsy profit
Amazon FBA profit calculator
Work out your profit per unit after fees, fulfillment and advertising.
≈ 4 minutes
Calculate my Amazon FBA profit
Contribution margin calculator
What each order really leaves you, and how much of that you can spend winning the customer.
≈ 3 minutes
Work out my contribution margin
Landed cost calculator
What each imported unit really costs once it is sitting in your warehouse, ready to sell.
≈ 4 minutes
Work out my landed cost
Free shipping threshold calculator
The order value above which you can give shipping away without losing money.
≈ 2 minutes
Work out my free shipping threshold
Maximum profitable CAC calculator
How much you can afford to pay for a customer without giving up your profit.
≈ 3 minutes
Work out my maximum CAC
CAC payback period calculator
How many months it takes to recover what you paid to acquire a customer.
≈ 3 minutes
Work out my payback period
Reorder point calculator
The stock level at which you have to place the order to avoid running out.
≈ 3 minutes
Work out my reorder point
Safety stock calculator
How many buffer units you need so a deviation does not leave you out of stock.
≈ 4 minutes
Work out my safety stock
Inventory carrying cost calculator
What a full warehouse costs you per year, and what share of your inventory that is.
≈ 4 minutes
Work out my carrying cost
Stockout cost calculator
What running out of stock really cost you, in lost contribution and extra spending.
≈ 4 minutes
Work out my stockout cost
Bundle profitability calculator
Whether the bundle you are building leaves more money than selling the same items separately.
≈ 5 minutes
Check my bundle profitability
Maximum profitable discount calculator
How far you can cut the price without falling below the margin you want to keep.
≈ 2 minutes
Work out my maximum discount
Discount break-even sales calculator
How many more units you have to sell so a discount does not leave you worse off.
≈ 3 minutes
Work out the sales I need
Minimum profitable price calculator
The price below which you lose money, and the one your target margin needs.
≈ 3 minutes
Work out my minimum price
Cash conversion cycle calculator
How many days pass between paying your supplier and collecting from your customer.
≈ 4 minutes
Work out my cash cycle
MOQ profitability calculator
Whether the supplier's minimum order pays off once you have paid to hold it.
≈ 5 minutes
Evaluate the supplier MOQ
Sales channel profitability comparison
Which sales channel leaves most per order for the same product and its real costs.
≈ 5 minutes
Compare my sales channels