Void-Ratio Excavation Savings Calculator

See how much less ground you’d dig for the same usable storage volume, by system type.

Target Usable Storage (m³)

[ AWAITING TARGET VOLUME DATA ]

Volume Comparison

Geocellular crate (95% void)–

Gravel / rubble trench (30-35% void)–

Poured concrete vault (~100% void)–

Excavation volume shown is the hole size needed to hold the target usable storage at each system’s void ratio (target ÷ void ratio). Concrete needs the smallest hole but weighs ~2,400 kg/m³ versus ~30 kg/m³ for a geocellular module — installation speed and crane/plant requirements differ accordingly.

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