The answer depends on the depth to which the area is covered and, to some extent, that will depend on the size of the gravel.
I need to know how thick the layer of gravel is meant to be.
You will need about 463 cubic yards (around 594 tons) of gravel for this area.
That's not enough information. You need to know the width of the trench, and how much volume 1 ton of gravel is equivalent to.
1
The answer depends on the depth to which the area is covered and, to some extent, that will depend on the size of the gravel.
I need to know how thick the layer of gravel is meant to be.
You would need about 13 cu yards or about 15 tons.
You will need about 463 cubic yards (around 594 tons) of gravel for this area.
You cannot directly convert cubic yards to square yards because they measure different things: volume vs. area. Cubic yards measure volume, while square yards measure area. To find how many square yards cover the same area as a cubic yard of gravel, you would need to know the thickness or depth of the gravel layer.
You would need 7.2 cubic yards of gravel to cover an area that requires that volume of material. It's crucial to ensure that you acquire the right amount to prevent any shortage or surplus during your project.
The coverage area of 5 cubic feet of pea gravel will depend on the thickness at which it is spread. To determine this, you will need to know the desired depth of the pea gravel. You can calculate the square footage coverage by dividing the volume of the gravel (5 cubic feet) by the desired depth in feet.
To cover 300 square feet 4 inches thick, you would need approximately 3 cubic yards of gravel.
you would need 23 bags OK
32
That's not enough information. You need to know the width of the trench, and how much volume 1 ton of gravel is equivalent to.
You will need 0.12 cubic yards of gravel for an 8x8x90' area.