| What it does | Free garage heater sizing calculator using garage dimensions, insulation, and winter temperature
| Compare fees across 8 marketplaces to see what you'll actually keep when you sell
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| Stage | Not given
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| Founded | Not given
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| Based in | US
| US
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| Pricing model | Free
| Free
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| Pricing | Not given
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| Key features | - Calculates required heat output in BTU/hr and watts from garage dimensions, ceiling height, insulation, and winter temperature
- Adjustable insulation levels from poor to excellent with whole-space planning factors
- Published formula and methodology with documented sources
- Real-time calculator updates as you type input values
- ZIP or postal code reference using NOAA weather data for local temperatures
- Embeddable calculator iframe for integration on other websites
- Companion tools for installation costs and heating method comparison
| - 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
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| What makes it different | - Free and independent with no product catalog or affiliate commissions
- Transparent published formula so users can judge the estimate instead of trusting a black box
- Consistent sizing across all pages and guides using the same calculation engine
- Real climate data from NOAA hourly weather records for accurate local temperature estimates
| - 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
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 2 ▲ +2 (up) since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 0 | 0 |
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| Citation Flow (Majestic) | 14 | 0 |
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| Referring domains (Majestic) | 2 | 0 |
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Garage Heat Lab
Where Should I Sell?