Calculators

Soil Bearing Capacity Estimator

Updated September 5, 2026

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🏗️ Soil Bearing Capacity Estimator geotechnical · foundation design

Estimate allowable soil bearing pressure based on soil classification, moisture, and SPT N‑value (optional). Essential for slab, footing, and washout pan placement.

🏞️ Soil classification

Unified Soil Classification System (USCS)

💧 Moisture condition

Reduces bearing capacity when saturated

📊 SPT N‑value (blows/ft)

Standard Penetration Test result

📏 Foundation width (ft)

For shallow foundations (footings)

⚙️ Load type

Dynamic loads require lower capacity

📐 Based on Terzaghi & Peck, Bowles, and IBC 2021. Allowable bearing pressure (psf) varies with soil, moisture, and settlement tolerance. SPT N‑value correlation used for granular soils. Always verify with site‑specific geotechnical report.

Compiled by the Reborn Rental team, backed by our field engineers and dispatch staff working Denver-metro concrete washout and equipment rental jobs.

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Soil Bearing Capacity Estimator

🏗️ Soil Bearing Capacity Estimator geotechnical · foundation design