This depends on the Specific Gravity of the armourstone materials. However for a pile of armourstones with say 30% voids and a Specific Gravity of 2.65 ish (granite, limestone or similar) the tonnage would be calculated by 1.8 x the volume. So 15 cubic metres of armourstone would weigh 15 x 1.8 tonnes = 27 tonnes
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To determine the weight of a cubic meter of 13mm building stone, we need to know the density of the stone. Assuming a typical density of 2.6 grams per cubic centimeter for building stone, we can convert this to kilograms per cubic meter by multiplying by 1000. Therefore, a cubic meter of 13mm building stone would weigh approximately 2600 kilograms, or 2.6 metric tons.
1m3 of 19mm stone = 1.36 tonne
No cubic decimeters are in a meter. There are 1000 cubic decimeters in 1 cubic meter.
one cubic meter is 35.3 cubic feet
One cubic meter equates to 61,023.74 cubic inches.