Measure length, width and depth
Enter length and width in feet. For depth, select inches or feet; the calculator converts inches to feet by dividing by 12. Enter decimal measurements where needed.
Volume and tonnage formulas
Cubic feet = length (feet) × width (feet) × depth (feet)
Cubic yards = cubic feet ÷ 27
tons = cubic feet × density (pounds per cubic foot) ÷ 2,000
Worked example — arithmetic only
An area 10 feet long, 10 feet wide and 1 foot deep is 100 cubic feet, or 3.70 cubic yards. With an explicitly entered density of 100 pounds per cubic foot, 100 × 100 ÷ 2,000 = 5.00 tons.
The 100-pound density is example test data, not a supplier recommendation or an approved material preset.
Density and material assumptions
Granite and limestone defaults use Vulcan’s general product-family estimates; its calculator does not specify loose or compacted condition. Other materials retain separate planning references. All defaults are editable. Material grading and moisture affect bulk weight. Use dimensions and density for the same material condition; a finished compacted depth is not a loose delivered volume. No waste, shrinkage or compaction adjustment is added.
Common gravel and base rock questions
What if I do not know the density?
Leave density blank. You will still receive cubic yards; the tonnage result will say Density needed.
Does one ton equal one cubic yard?
No. A cubic yard measures volume; a ton measures weight. Density connects the two, so the relationship is not the same for every material.
Is the depth loose or compacted?
The calculator uses the depth you enter. Confirm the intended condition and matching density with your supplier or JMEC before ordering or placement.
Discuss your project with JMEC
Use these figures to start a conversation about your actual site, material and scope.