What the Powder Coating Area Calculator does
This tool estimates how much surface you are coating and how much powder it takes. Choose a flat panel, an open box or a custom area, enter the size and the number of parts, and it returns the total paint area, the powder needed and, with a price per kilo, the coating cost. It is built for fabricators and finishers quoting powder-coat work on panels and enclosures.
The area is exact geometry; the powder figure uses a coverage you control, so you can match it to your booth and film thickness.
How to use it
- Choose the part type: flat panel (both sides), box/enclosure, or custom area.
- Enter the dimensions, or the custom area in m².
- Set the coverage (m²/kg) and the number of parts.
- Read the total surface area and powder needed. Add a price per kg for the coating cost.
Why use it here
It is free, instant and private, with no sign-up. It gives area, powder and cost together so you can quote a coating job in seconds, and the coverage is adjustable so the estimate fits your process. Remember to add an overspray margin for real consumption.
Tip: for the blank size and weight of the part before coating, use the box flat pattern and metal weight calculators.
Frequently asked questions
- How is the coating surface area calculated?
- For a flat panel it is both faces, 2 × length × width. For an open box it is the base and four walls counted inside and out, 2·L·W + 4·(L+W)·H. Or enter a custom area directly. The total is multiplied by the number of parts.
- How much powder will I need?
- Powder needed = total area ÷ coverage. Coverage depends on film thickness and material, typically around 8 to 12 m² per kilogram; the tool defaults to 10 and you can change it. Add a price per kilogram to estimate the coating cost.
- Does it include overspray and waste?
- No, it gives the theoretical applied area. Real powder use is higher because of overspray and reclaim losses, so add a margin (often 20 to 40 percent) on top, or lower the coverage figure to account for it.
- Can I use it for shapes other than panels and boxes?
- Yes, pick Custom area and enter the surface area per part in square metres from your drawing or CAD model. The tool then handles the powder and cost for your quantity.
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Last updated: June 23, 2026