Calculate exact paint gallons and liters for interior rooms or exterior siding — deducting doors and windows, adjusting for surface texture, and finding the cheapest mix of 5-gallon buckets vs. 1-gallon cans.
| Material / Application | Standard Spec / Depth | Coverage / Weight | Field Note |
|---|---|---|---|
| Smooth Primed Drywall (Glattwand) | 350 – 400 sq ft / gal | 9 – 10 m² / Liter (100–110 ml/m²) | 2 coats standard for color change |
| Textured Drywall / Raufaser | 280 – 325 sq ft / gal | 7 – 8 m² / Liter (130 ml/m²) | +20% surface area due to texture peaks |
| Unprimed New Drywall / Bare Plaster | 250 – 300 sq ft / gal (1st coat) | 6 – 7,5 m² / Liter | Use dedicated PVA drywall primer first |
| Exterior Stucco / Brick / CMU Block | 175 – 250 sq ft / gal | 4,5 – 6 m² / Liter (180–220 ml/m²) | Porous surface absorbs heavily on coat 1 |
Free cubic yard and tonnage calculator for gravel, concrete, mulch, asphalt, roofing, pavers, cinder blocks, topsoil, and paint. Multi-zone builder + printable estimate sheet.
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One US gallon (3.785 liters) of quality interior latex paint covers 350 to 400 square feet (32 to 37 m²) for a single coat on smooth, primed drywall. For two coats, 1 gallon covers roughly 175 to 200 square feet of wall.
Standard estimating rules subtract 21 square feet (3 ft × 7 ft) per interior door and 15 square feet (3 ft × 5 ft) per standard window.