Know your break-even
See the most you can pay for an item and still walk away with the profit you want.
Profit first for marketplace sellers
Know what you'll actually make.
Calculate true take-home profit after fees, shipping, product cost, packaging, advertising, discounts, and other direct costs.
Try a real profit scenario without creating an account.
Example scenario — Sneaker flip
Net profit
$28.40
Margin
33.5%
Break-even price
$56.90
Why sellers like it
See your real profit, not a guess.
Set a profit goal
Tell it the margin or dollar amount you're after, and it works backward to the sale price.
Keep track after the sale
Sign up and your orders, refunds, and inventory roll into real profit reports, not just estimates.
Made for late-night flips
Prefer the dark? Try it right here.
MarginMetric ships with a full light and dark theme. Flip the switch to preview it now — your choice carries straight into the app.
What you can do
Everything that eats into your price, in one place.
Check your profit before you buy the item.
Watch your margin move as fees and shipping change.
Compare platforms side by side before you decide where to list.
A quick example
- Sale price$45.00
- Platform fees-$6.30
- Shipping-$8.00
- Item cost-$16.50
Net profit
$14.20
Try it yourself
Play with real numbers below — no account needed.
What-if decision tool
Profit Sandbox
Test a sale before you list it. See what you will actually keep after product cost, shipping, marketplace fees, advertising, and discounts.
- 1Set the sale
- 2Add costs and fees
- 3Review profit
What will the buyer pay?
Start with the item price, quantity, buyer-paid shipping, and any order discount.
The listing price before buyer-paid shipping.
Revenue collected from the buyer for shipping.
The total discount applied to this order.
Tip: Tap any amount once to replace it. Cents work too, like 12.50.
What does this sale cost you?
Product cost is per item. Shipping and packaging apply to the whole order.
Product cost is 0. Make sure you include the cost of goods.
Your shipping label cost
Mailers, boxes, tape, inserts, and labels.
Returns and advanced costs
Add assumptions that do not apply to every sale.
Use only when you want this scenario to include a refund assumption.
A buffer for damage, returns, or other expected loss.
Ready when you are
Enter a selling price and your product cost to estimate profit.
Like your numbers? Keep them.
Sign UpGood to know
Questions, answered.
Can I try the calculator without an account?
Yes. Try the calculator without signing up, then create an account when you want to save products, orders, and reports.
Which marketplaces does it work with?
The calculator works for any platform — pick a fee preset or enter your own fees and it handles the math. If you sell on eBay, you can connect your account to pull orders in automatically, with more marketplaces on the way.
Do I have to connect my selling account?
No. The calculator and manual order entry work on their own. Connecting eBay is optional — it just saves you from typing orders in by hand.
Is my data private?
Your numbers are yours. MarginMetric never sells or shares your data, and you can delete your account and everything in it at any time. See the Privacy Policy for details.
Do I need any accounting know-how?
Not at all. If you know your sale price, item cost, and roughly what shipping runs, MarginMetric turns that into real profit and margin for you.
Still have a question? Email us — a real person (the one who built it) will get back to you.