You didn’t make $20 on that sale. After fees and ads, you made $4.

Most sellers don’t really know their margins. Vellbrook shows you the real number on every product — so you can price with confidence, cut the losers and keep more of what you earn.

Why Vellbrook

  • Your true net profit

    See exactly what’s left after COGS, shipping, fees and ad spend — per product, not guesswork.

  • Fees that fill themselves in

    Pick your marketplace and the right Etsy, Shopify or Amazon fees load automatically.

  • Excel & Google Sheets

    Works in both, on Mac and PC. No app, no login, no learning curve.

  • Yours forever

    A one-time purchase with free updates when platform fees change. No subscription.
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Built by a seller, for sellers

I sell online too — and I got tired of “good months” on paper that vanished after Etsy took its cut, the card processor took theirs and the ads ate the rest. So I built the spreadsheet I wished existed: one that tells the truth on every product. No fluff, no subscription. Open it, type your numbers, and you’ll know.

Get the tools

Questions, answered.

What exactly do I get?

A spreadsheet you download instantly and use in Excel or Google Sheets. It calculates your true net profit, margins, break-even ROAS, pricing and a monthly P&L.

Does it work in Google Sheets?

Yes — Excel and Google Sheets both, on Mac and PC. For Sheets, just open the file and choose “Make a copy.”

Which marketplaces does it cover?

Etsy, Shopify, Amazon, eBay and Walmart fees are built in and fully editable, so your numbers stay accurate when the platforms change theirs.

Is there a free version?

Yes — grab the free calculator to run one product, then upgrade to the full dashboard when you want your whole store at once.

Start free. See what you keep.

The free calculator shows your real net profit on any product — instant download, no catch. Upgrade to the full dashboard whenever you’re ready.

Get the free calculator