Excavation Volume Calculator
Pit excavation quantity: enter the bottom dimensions, depth and side slope (horizontal : vertical) and the volume follows from the frustum formula; the bulked spoil volume is reported using the bulking factor. Enter 0 for vertical sides.
Disclaimer：Results are produced by deterministic formulas and are intended for quantity estimating and option comparison only. A qualified engineer must verify them against the project specification, design documents and actual site conditions before use. The author accepts no liability for any loss arising from their use.
ASSUMPTIONS
RESULT
CALCULATION
METHOD
Sloped pits use the frustum (truncated pyramid) formula
V = h/3 × (A₁ + A₂ + √(A₁·A₂)); with vertical sides it reduces to the prism V = A₁ × h; bulked spoil = bank volume × bulking factor.- Sloped pits are computed by the frustum formula:
V = h/3 × (A₁ + A₂ + √(A₁·A₂)). - The bulking factor is empirical and varies with soil type: sand ≈ 1.10–1.15, clay ≈ 1.20–1.30.
- Deep excavations involve shoring and dewatering and must be designed by a geotechnical engineer; these results are for quantity estimating only.
More in this series
Engineering Translation
Working across languages on tenders, specs and technical clauses? EngTranslate gives you domain-trained Chinese ⇄ English translation, a construction & BIM terminology base, and metric–imperial unit handling in one place. EngTranslate →