Skip to main content
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.