Expert Guide

Babu

Earthwork & Excavation

Sloped Pit Calculator – Safe Excavation

Quality Inspector

Kaka

Estimate volume for pits with angled sides.

📐 Formula & Method

Prismoidal formula: V = (D/6) × [ (L1×W1) + (L2×W2) + 4×((L1+L2)/2 × (W1+W2)/2) ].

Volume = Prismoidal Formula

📋 Worked Example

Bottom 2x2, Top 3x3, Depth 1.5:
• Area Top = 9, Area Bottom = 4
• Volume ≈ 9.5 m³

❓ Frequently Asked Questions

When to use sloped sides?

Whenever the excavation depth exceeds 5 feet (1.5m), slopes or shoring are required for safety.