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Seller Margin Lab

Built for Whatnot sellers

See what you actually made.

Turn your Seller Weekly Orders Report into a clear breakdown of sales, fees, refunds, shipping, and estimated profit.

No upload server, signup, or spreadsheet formulas

Drop your weekly report here

CSV only, up to 10 MB. Your file never leaves this browser.

No report yet?

01

Upload

Use the weekly CSV from Financials → Statements.

02

Add costs

Fill any inventory or operating costs not in the report.

03

Understand

Review profit, margin, fees, refunds, and adjustments.