Is the Coupang margin calculator free?

Yes. No sign-up, no payment. Everything is calculated in your browser and nothing you type is stored.

Should the selling price include VAT?

Yes, enter what the customer actually pays. Coupang's commission is charged on the final paid amount, after coupons and discounts.

How is break-even ROAS calculated?

Selling price divided by per-unit margin, which is the inverse of the margin rate. A 20% margin gives 5, a 10% margin gives 10 — that is how much you must sell per unit of ad spend to break even.

Does this match my actual settlement?

No. The rates here are category reference values, and real settlements also carry promotion fees, returns and exchanges. The final figure is the one in your Coupang seller console.

Coupang margin calculator — fees, VAT, break-even ROAS

Margin calculator

At this price, how much do you really keep?

Run the numbers before you pay for stock. RocketLens computes your per-unit margin after Coupang fees and VAT, plus break-even ROAS, on the spot. No sign-up, no payment.

Enter price and sourcing cost to see what is left.

Selling price (what the customer paid)

KRW

Here is what came out

Selling price: —
Coupang commission: —
VAT: —
Sourcing cost: —
Courier and materials: —

What is left: —

Returns and ad spend are not in this calculation. Neither are Rocket Growth inbound and storage fees, and we do not know those numbers.

Losses come from returns more than from cost price. The cost was fine; two returns wiped out the profit.

Rates are category reference values. Confirm your settled rate in Coupang Wing.

Frequently asked questions

Is the Coupang margin calculator free?: Yes. No sign-up, no payment. Everything is calculated in your browser and nothing you type is stored.
Should the selling price include VAT?: Yes, enter what the customer actually pays. Coupang's commission is charged on the final paid amount, after coupons and discounts.
How is break-even ROAS calculated?: Selling price divided by per-unit margin, which is the inverse of the margin rate. A 20% margin gives 5, a 10% margin gives 10 — that is how much you must sell per unit of ad spend to break even.
Does this match my actual settlement?: No. The rates here are category reference values, and real settlements also carry promotion fees, returns and exchanges. The final figure is the one in your Coupang seller console.