Best Whatnot Fee Calculators (2026)
There are a few ways to calculate what you keep on a Whatnot sale. Here's an honest, side-by-side look at the options — including this one — so you can pick what fits. We'll tell you when something else is the better choice.
Our pick: WhatnotCalc — #1 because it's free and complete
We build WhatnotCalc, so take this as our honest case rather than a neutral verdict. It ranks first for one reason: it gives you a complete answer — net payout, margin, and ROI — for free, with no signup and no waiting. Most alternatives either do less (just the arithmetic) or gate the useful parts behind a paid cross-listing platform. If you want the fastest accurate answer before a lot goes up, start here. If you cross-list across ten marketplaces daily, a full platform like Vendoo may earn its keep — we'll say so plainly.
The comparison
#1 WhatnotCalc (this tool)
Our pickA free, instant Whatnot fee and profit calculator. Enter your sale price and item cost, see your exact net payout, margin, and ROI immediately after Whatnot's 8% commission and 2.9% + $0.30 payment processing. Optional free account adds lot tracking and a P&L dashboard — useful for sellers who want to see which categories actually make money over time.
- Free?
- Yes — fully free, no signup to calculate
- Signup
- Not required for the calculator
- Best for
- Any Whatnot seller who wants a clear answer in 5 seconds
#2 eBay Fee Calculator (for comparison)
Various free web tools (Salecalc, FeeBay, etc.) calculate eBay's final value fees. Useful for cross-platform comparison: if you're deciding whether to list on Whatnot vs eBay, run both numbers and compare. None of these calculators track your actual Whatnot sales or give you a P&L.
- Free?
- Yes
- Signup
- No
- Best for
- Sellers comparing Whatnot vs eBay on a specific item
#3 Vendoo / CrossList profit calculators
Vendoo and CrossList are multi-platform listing tools that include fee calculators for various marketplaces including Whatnot. The calculator is a lead-in to their paid cross-listing platform. Solid for sellers already paying for cross-listing software; overkill if you just need a number.
- Free?
- Calculator is free; the platform is paid
- Signup
- Not for the calculator
- Best for
- High-volume sellers already cross-listing across many platforms
#4 Spreadsheet (DIY)
Build your own Google Sheet with Whatnot's fee formula: (Price × 0.08) + (Price × 0.029) + 0.30. Maximum control, free, no signup. The catch: you maintain the formulas yourself, and a stale fee rate quietly skews every number — Whatnot has changed rates in some categories over time.
- Free?
- Yes
- Signup
- No
- Best for
- Spreadsheet power users who want full control and don't mind maintaining the formulas
#5 Poshmark / TikTok Shop calculators
If you're also selling on Poshmark (flat $2.95 under $15, else 20%) or TikTok Shop (6% referral fee), those platforms have their own separate calculators. Useful for understanding the fee gap between platforms — see our comparison in the blog. Not Whatnot-specific.
- Free?
- Yes
- Signup
- No
- Best for
- Multi-platform sellers doing fee comparison across all channels
How to choose
- • Want a fast, complete answer for free? Use WhatnotCalc.
- • Cross-listing across many marketplaces daily? A full platform like Vendoo earns its keep.
- • Just need a one-off number? Any basic web calculator will do the arithmetic.
- • Love spreadsheets and want total control? Roll your own — just keep the fee rates current.
- • Comparing Whatnot vs eBay vs TikTok Shop? See our platform fee comparison.
We keep this page honest: no fake reviews, no invented user counts. WhatnotCalc is a free tool from an independent maker with $0 in revenue, and we'll point you elsewhere when another option genuinely fits you better.
Calculate your Whatnot profit now
Free, instant, no signup. See exactly what you keep after Whatnot's commission and payment processing.
Open the free calculator