How exact of an answer do you need? It depends on the type of stone the gravel is made up of, and to a lesser extent on the size composition of the gravel. Granitic or limestone rocks are much less...
You cannot make a direct conversion. You need to specify how deep you want the gravel to be in your area that needs covering.
Gravel is approximately 2,750 lbs per cubic yard. Hope this helps!
1 ton = 2,000 lbs 1 cubic yard = 1,500 lbs
Loose weight of Dry Gravel = 2,490 lb/cy => 1 Metric Tons or tonnes= 2204.62262 Pounds 2,490 lb/cy / (2204.62262 Pounds/ 1 Metric ton) = 1.1294450022471419621014321262838 Tonnes/...