Trim Paint Calculator
Calculate how much paint you need for baseboards, crown molding, door frames, and other trim.
Enter linear feet and trim width.
Paint Needed
Trim paint coverage is calculated from the surface area of the trim.
Surface Area = Linear Length × Trim Width
Paint Needed = Surface Area / Coverage per Quart
Paint coverage (per quart):
- 1 quart covers approximately 100 sqft (9.3 sqm) of smooth trim
- 1 liter covers approximately 10 sqm (107 sqft)
- Rough or textured surfaces reduce coverage by ~20%
Common trim widths:
- Baseboards: 3–5.5 inches (7.5–14 cm)
- Crown molding: 3.5–7 inches (9–18 cm)
- Door/window casing: 2.5–3.5 inches (6–9 cm)
- Chair rail: 1.5–3 inches (4–7.5 cm)
Typical trim lengths per room:
- 10×12 room: ~44 linear feet of baseboard
- Standard door: ~17 linear feet of casing
- Standard window: ~12 linear feet of casing
Two coats are usually recommended for trim.