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Earthwork average end-area calculator.

Estimate the in-situ volume between two measured cross-sections and keep a separate planning allowance visible.

read the result

Two measured areas can frame a site quantity.

The average-end-area method estimates the volume between adjacent sections by multiplying their average area by the station spacing. It is useful for a transparent first quantity when the section basis is known.

Governing relationship

For areas A1 and A2 separated by L, the in-situ volume is V = L(A1 + A2) / 2. The optional planning allowance is shown separately as Vplan = V × (1 + allowance).

Do not hide material behaviour.

  • Irregular terrain, rapidly changing sections, transitions, and end conditions may need closer stations or a different volume method.
  • Bulking, shrinkage, compaction, moisture, unsuitable material, and haul classification are not inferred from the allowance.
  • Confirm survey control, section chainage, and whether the areas are cut, fill, stockpile, or disposal quantities.