A pack may contain several boards and cover a non-round area. Enter the labelled area per pack, not the area of one plank, in a pack calculator. Keep the measurement unit visible on the note you take to the supplier. A worked example Item Example or check Room area 23 m² Chosen allowance 8% Target […]
A paint estimate needs the surface area being coated. For four rectangular walls, add each wall area, or multiply room perimeter by wall height when heights are equal. Add a ceiling only if you plan to paint it with the same product. A worked example Item Example or check Room 4 m × 3 m […]
A spreading rate such as 10 m²/L normally describes one coat under stated conditions. Two coats over the same wall require two passes over its area. Tin size affects the purchase count after the litres have been estimated. A worked example Item Example or check Net area 40 m² Coats 2 Illustrative coverage 10 m²/L […]
The geometric volume of a bed comes from its area and depth. Converting that volume to a mass requires bulk density. This is the density of the supplied aggregate including spaces between particles, not the solid-rock density. A worked example Item Example or check Bed 6 m × 2 m Depth 0.05 m Net volume […]
Soil before excavation occupies an in-situ volume. After digging, the loose material can occupy more space. A planning tool can apply a user-entered bulking percentage, but it cannot determine that percentage from the excavation dimensions. A worked example Item Example or check Excavation 4 m × 2 m × 0.5 m In-situ volume 4 m³ […]
A simple wall-face estimate divides wall area by a repeating brick-and-joint module. It needs the brick face length and face height. Brick depth is a different measurement and cannot be substituted for face height. A worked example Item Example or check Face length 215 mm Face height 65 mm Joint 10 mm Module area 0.225 […]