Toy Paint Coverage Calculator
Calculate how much paint you need for a wooden or foam toy.
Enter toy shape, dimensions, number of coats, and paint type to get paint volume in milliliters.
Toy paint calculations start with surface area, then account for paint coverage rate and number of coats.
Surface area by shape:
- Rectangular block: SA = 2(LW + LH + WH)
- Cylinder: SA = 2 x pi x r x (r + H)
- Sphere: SA = 4 x pi x r squared
For assembled toys with multiple parts, calculate each piece and add them up. Subtract area at glued joints where paint does not go.
Paint volume formula:
paint_mL = (surface_area_cm2 x coats) / coverage_rate_cm2_per_mL
Coverage rates by paint type:
- Acrylic craft paint (Apple Barrel, DecoArt): 50-70 cm2/mL
- Artist acrylic (higher pigment): 40-55 cm2/mL
- Latex house paint: 80-100 cm2/mL
Porous surfaces like raw wood absorb more on the first coat. A sanding sealer or gesso primer reduces absorption and can cut total paint use by 30-40%.
Child-safe paints:
For toys intended for children, use paints certified for toy safety:
- US: CPSC regulations and ASTM D-4236
- EU: EN 71-3 chemical migration limits
Look for “non-toxic” or AP certified (Arts and Creative Materials Institute) labeling. Never use solvent-based or lead-containing paints on toys.