Gravel volume and tonnage
Volume comes from geometry; tonnage comes from density. Those are deliberately separate inputs because crushed stone, washed gravel, base, moisture, and gradation do not all weigh the same.
cubic yards = length × width × (depth ÷ 12) ÷ 27
tons = cubic yards × supplier density
Use your supplier's tons-per-cubic-yard figure when available. The default is only an editable starting value.