| What it does | Free marketplace fee calculators for Etsy, eBay and Amazon FBA
| Construction calculators that show their math
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| Stage | Startup
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| Founded | 2025
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| Based in | Not given
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| Pricing model | Free
| Free
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| Pricing | Not given
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| Key features | - Etsy fee calculator with itemized fees and net payout
- eBay seller profit calculator with Final Value Fee calculation
- Amazon FBA profit calculator including fuel and logistics surcharge
- Poshmark fee calculator with $2.95 vs 20% comparison
- Mercari fee calculator with 10% flat fee calculation
- Depop fee calculator showing 0% seller fees
- Vinted fee calculator with buyer protection fee analysis
- Transparent formulas and variable explanations
- Rates verified from official seller fee schedules
| - Every constant cited to ASTM, CMHA, or datasheet
- Two calculation methods shown separately
- Free and private, no account required
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| What makes it different | - Every fee itemized with true net payout and margin shown
- All calculations run client-side in browser with instant and private results
- Rates verified against official platform fee schedules
- No sign-up, no data collection, no paywalls
- Industry-standard formulas with transparent calculations
| - Every constant traced to named source and shown next to result
- Shows both methods when they disagree instead of averaging them
- Solves massive discrepancy in published block fill volumes
- Calculations run in browser with no data storage
- Built on version-controlled, auditable reference data modules
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | Not checked yet ● no change since last check | 8 ● no change since last check |
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| Trust Flow (Majestic) | 0 | 5 |
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| Citation Flow (Majestic) | 0 | 22 |
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| Referring domains (Majestic) | 0 | 7 |
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