| What it does | Compare fees across 8 marketplaces to see what you'll actually keep when you sell
| Free Mifflin-St Jeor calculator that shows every step of the equation
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| Stage | Not given
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| Founded | Not given
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| Based in | US
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| Pricing model | Free
| Free
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| Pricing | Not given
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| Key features | - Compare fees across 8 marketplaces at once
- Includes shipping costs and sales tax in calculations
- US state-by-state sales tax rates for all 50 states
- Fee rates checked against official platform pages in October 2026
- Shows what you actually keep after every fee
- Works on mobile while you list items
- Individual platform fee calculators
- Platform comparison tools
| - Shows full equation working with step-by-step substitution
- Multiple activity levels from sedentary (×1.2) to extra active (×1.9)
- Katch-McArdle calculator using body fat percentage
- Step-based TDEE estimation
- Adaptive TDEE calculator from weight changes
- Embeddable calculator iframe
- Metric and imperial unit switching
- Comparison with other equations like Harris-Benedict
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| What makes it different | - Accounts for how each platform charges fees on shipping and sales tax differently
- Shows exact amounts you keep, not just percentages
- Fees verified against platforms' official documentation
| - Shows all working so users can verify the math themselves
- Uses the most accurate equation for healthy adults
- Multiple calculation methods beyond basic equation
- Transparent about accuracy limitations and sources
- Completely free with no tracking or cookies
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| Community votes | 0 | 0 |
| DR (Domain Rating by Ahrefs) | Not checked yet ● no change since last check | 16 ▲ +1 (up) since last check |
| Trust Flow (Majestic) | 0 | 1 |
| Citation Flow (Majestic) | 0 | 16 |
| Referring domains (Majestic) | 0 | 3 |