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Metric + US customary

Stockpile Volume and Weight Calculator

Estimate cubic metres, cubic yards, tonnes, short tons and vehicle loads from a measured cone, truncated cone, rectangular pile or triangular windrow.

Describe the stockpile

Measure representative maximum dimensions and choose the closest idealised shape.

Local calculation
Replace the preset with a measured or supplier density where possible.
m
m
m
m
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%
Use only where measurement or survey data supports it.
kg/m³
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Measurement limitation: A stockpile is rarely a perfect geometric solid. This estimate does not replace a survey, inventory reconciliation, weighbridge record or competent commercial measurement.

Stockpile shapes and formulas

A conical pile uses its base radius and vertical height. A truncated cone adds a measured top diameter. A rectangular pile uses length × width × average height; it should not use the maximum height throughout. A triangular windrow assumes a triangular cross-section.

cone = π × radius² × height ÷ 3
frustum = π × height × (R² + Rr + r²) ÷ 3
rectangular = length × width × average height
windrow = length × base width × height ÷ 2

How to measure more reliably

  • Measure two or more base diameters where a pile is not circular.
  • Use several height observations for rectangular or flattened piles.
  • Keep obstructions, retaining walls and inaccessible toes in the field notes.
  • Use a negative or positive adjustment only when supported by a survey comparison or a documented site method.

From volume to weight

The chosen volume is multiplied by bulk density. Loose aggregate, compacted aggregate and saturated aggregate can have materially different densities. The default presets are starting points, not certificates.

Frequently asked questions

Which shape should I use for an irregular stockpile?

Choose the closest simple geometry, measure several representative dimensions and document any adjustment. For valuable or contractual inventory, use a competent survey method.

How is stockpile weight calculated?

Adjusted volume is multiplied by the entered bulk density. Confirm density and moisture before relying on the mass result.

Can I enter dimensions in feet?

Yes. Select US customary to use feet, pounds per cubic foot and short tons. Results also show cubic yards and metric equivalents.