Inputs
Note: Tonnes are estimated from typical bulk densities. Actual weights vary by moisture content and supplier.
Results
Enter your dimensions then click Calculate.
NAIBC / IRC codes
References & Sources
Standards Cited
- ASTM C33 — Standard Specification for Concrete Aggregates
Defines aggregate properties, grading, and density values for concrete aggregates - ASTM D2940 — Standard Specification for Graded Aggregate Material For Bases or Subbases for Highways or Airports
Specification for ABC (Aggregate Base Course) and other sub-base aggregates
Formulas Used
- Volume:
volumeM3 = length x width x depth
Source: Basic geometry - Loose order volume:
looseVolumeM3 = installedVolumeM3 x compactionFactor
Source: Material-specific compaction allowance — MOT Type 1 uses 1.25; crushed stone uses 1.1; non-compacting materials use 1.0 - Weight from volume:
tonnesRequired = volumeM3 x density / 1000
Source: ASTM C33 / ASTM D2940 — Densities: gravel 1600, sand 1600, crushed stone 1600, MOT Type 1 2000, ballast 1750 kg/m3 - Bulk bags:
bulkBags = ceil(looseVolumeM3 / 0.75)
Source: Industry standard bulk bag size (0.75 m3)
Key Assumptions
- Material densities: gravel 1600 kg/m3, sand 1600 kg/m3, crushed stone 1600 kg/m3, MOT Type 1 2000 kg/m3, ballast 1750 kg/m3 — ASTM C33 / ASTM D2940
- Loose-volume factors: MOT Type 1 1.25, crushed stone 1.1, other listed materials 1.0 — Industry compaction allowances
- Bulk bags assumed to hold 0.75 m3 each — Industry standard bag size
- Loose bags assumed to be 25kg each — Industry standard bag size