BUILDING & PLANNING · DENSITY CALCULATOR
Broken stone ballast weighs 1,600 to 1,870 kg/m³ (15.7 to 18.35 kN/m³) dry and well shaken, by IS 875, and 1,920 to 2,240 kg/m³ when perfectly wet. The figure depends on grading and how tightly it is packed, so use 1,600 kg/m³ for loose stockpiles.
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| Unit weight | 15.69 kN/m³ |
| Density | 1.600 g/cm³ (t/m³) |
| Density | 99.9 lb/ft³ |
| Mass in tonnes | 1.600 t |
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From IS 875 (Part 1):1987 Table 1.
| Material | Unit weight | Density |
|---|---|---|
| Broken stone ballast, dry and well shaken | 15.70 to 18.35 kN/m³ | 1,600 to 1,870 kg/m³ |
| Broken stone ballast, perfectly wet | 18.85 to 21.95 kN/m³ | 1,920 to 2,240 kg/m³ |
To convert: kN/m³ = kg/m³ × 9.81 ÷ 1,000; lb/ft³ = kg/m³ × 0.0624.
The weight of 2.5 m³ of aggregate (1,600 kg/m³):
Typically about 1,500 to 1,700 kg/m³ loose and dry, depending on the rock and grading. Test your own supply (IS 2386 Part 3 or ASTM C29) for an exact figure.
No. Unit weight (bulk density) includes the voids between stones; specific gravity is for the solid rock, about 2.6 to 2.8 for most aggregates.
About 1.6 to 1.9 tonnes dry, so a 10 m³ tipper carries roughly 16 to 19 tonnes.
