Gravel Calculator
In the UddenWentworth scale, gravel is egorized as granular gravel if it is 244 mm ( in) in diameter or pebble gravel if it is 466 mm ( in) in diameter. On the other hand, ISO 146881:2002 classifies gravel as fine ( mm), medium ( mm), or coarse gravel (2063 mm). How much gravel do I need?