BuildCalcs Depth conversion
| mm | metres |
|---|---|
| 1 mm | 0.001 m |
| 10 mm | 0.01 m |
| 25 mm | 0.025 m |
| 50 mm | 0.05 m |
| 75 mm | 0.075 m |
| 100 mm | 0.10 m |
| 125 mm | 0.125 m |
| 150 mm | 0.15 m |
| 200 mm | 0.20 m |
Core formulas
- Rectangle area
- length × width
- Rectangular volume
- length × width × depth
- Number of whole units
- required area ÷ unit coverage, rounded up
- Percentage allowance
- base quantity × (1 + allowance ÷ 100)
- Paint litres
- paintable area × coats ÷ stated coverage per litre
- Roof slope factor
- 1 ÷ cos(pitch angle)
How to use these references
Reference tables are useful for sense-checking, not replacing project-specific measurements. If a product manufacturer or supplier states a particular coverage, density, pack size or installation requirement, use that project-specific information rather than a generic assumption.
For the reasoning behind rounding, allowances and validation, see Methodology & accuracy.