Aggregate Stockpile Volume Calculator
Estimate stockpile volume from measured geometry, then convert the result into approximate tonnes using bulk density. Choose a pile model instead of forcing every stockpile into one formula.
Stockpile geometry
Stockpile quantity result
Stockpile volume formulas
The correct equation depends on the geometry used to represent the stockpile.
Triangular prism: V = ½ × base × height × length
Trapezoidal prism: V = [(top width + base width) ÷ 2] × height × length
Mass: tonnes = volume × bulk density
Worked conical example
A conical aggregate pile with 5 m radius and 3 m height has a theoretical volume of about 78.54 m³. At 1.65 t/m³ bulk density, that corresponds to about 129.59 tonnes.
Why shape selection matters
A conical assumption may be useful for an isolated peaked pile, while a long windrow is better represented by a prism. Matching the geometry to the pile reduces avoidable estimation error.
Why density needs care
Aggregate bulk density is influenced by grading, moisture and packing. Using a laboratory particle density instead of a stockpile bulk density can significantly distort the mass estimate.
When to use a survey
For inventory reconciliation, payment measurement or large commercial stockpiles, surveyed or segmented measurements are preferable to a simplified geometric model.
Frequently Asked Questions
Can I calculate tonnes?
Yes, by entering bulk density.
What if the stockpile is irregular?
Use multiple geometric sections or a surveyed volume rather than one simple shape.
Is bulk density constant?
No.
Can this measure aggregate quality?
No. It measures estimated quantity only.