Auto Paint Calculator
Calculate how much automotive paint you need based on car size and number of coats.
Get accurate estimates in quarts or liters.
Car paint coverage works out how much material to buy for a complete, professional-quality finish, from a single panel up to a full respray.
Coverage Formula:
Paint Needed (oz) = Total Surface Area (sq ft) / Coverage Rate (sq ft/oz) × Number of Coats
Vehicle surface area benchmarks:
- Compact car (e.g., Honda Civic): about 175 to 200 sq ft
- Mid-size sedan (e.g., Camry): about 200 to 230 sq ft
- Full-size truck (e.g., F-150): about 260 to 300 sq ft
- SUV/Minivan: about 240 to 280 sq ft
Coverage rates by paint type (per wet coat):
| Paint Type | Coverage |
|---|---|
| Single-stage urethane | 10 to 12 sq ft/oz |
| Base coat | 12 to 15 sq ft/oz |
| Clear coat | 10 to 12 sq ft/oz |
| Primer or sealer | 8 to 10 sq ft/oz |
Standard coat counts:
- Base coat: 2 to 3 coats
- Clear coat: 2 to 3 coats
- Primer (if repainting bare metal): 2 to 3 coats
The figures above are for un-reduced paint straight from the can. In practice base coat is thinned with reducer (often close to 1:1) before it sprays, so the ready-to-spray volume you actually load into the gun is roughly double the raw-paint number. This calculator skips the area math and works from typical ready-to-spray volumes by vehicle size, which is what you buy and mix.
Worked example, full repaint of a mid-size sedan (2 base + 2 clear): Base coat: 1.2 quarts per coat × 2 = 2.4 quarts Clear coat: 1.2 quarts per coat × 2 = 2.4 quarts Subtotal: 4.8 quarts, and with 15% for waste and overspray, about 5.5 quarts ready to spray. That reconciles with the raw-paint math above once you account for reduction.
Buy one extra quart of base, and only base. Running out of clear mid-panel costs you a re-sand. Running out of base costs you a re-sand and a color re-mix, and a batch mixed a week later on a different tinting machine will not be an exact match on a metallic. Clear is forgiving that way, base is not.
Tips for accurate measurement:
- Multiply the square footage of each panel individually and sum them
- Doors, hood, roof, trunk lid, and quarter panels are the main areas
- Deep, dark colors (black, dark red) often require an extra base coat for uniform coverage
- Metallic and pearl finishes need proper flash time between coats. Rushing causes mottling, and mottling on a metallic cannot be buffed out.
How we build and check this calculator
This calculator runs entirely in your browser, so the numbers you enter stay on your device. The math behind it is written by hand and tested against worked examples and standard references before the page goes live.
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