About the Platform

Engineered for Accurate Earthwork Estimating

Eliminating under-ordering and costly delivery abort fees for driveway builders, civil contractors, and homeowners nationwide.

Our Engineering Mission

Estimating road base has historically been prone to significant field discrepancies. Most basic online calculators use a single generic conversion factor (e.g., 1.4 tons per yard) without differentiating between loose delivery volume and mechanically compacted in-place density.

Road Base Calculator was founded by professional civil estimators and earthwork engineers to provide transparent, multi-factor calculations that separate Proctor compaction loss (15%–22%) from excavation waste buffers (5%–15%) across all regional aggregate standards.

AASHTO & ASTM Compliance

Our material gradation densities reflect laboratory sieve test data conforming to AASHTO M147 and ASTM C33 standards for crushed limestone, dense graded aggregate (DGA), ABC stone, and recycled concrete aggregate (RCA).

Regional Precision

Whether you are sourcing TxDOT Item 247 caliche in West Texas, CDOT Class 6 in the Rockies, Caltrans Class 2 in California, or VDOT 21A in Virginia, our regional presets deliver accurate quarry density metrics.

Civil Estimating & Geotechnical Engineering Review

Peer-Verified

Formulas, density conversions, and lift recommendations are modeled after AASHTO M147 (Materials for Aggregate and Soil-Aggregate Subbase) and ASTM C33/D2922 standards. Reviewed by licensed civil engineers and heavy highway earthwork estimators.

• AASHTO M147 Compliant • ASTM C136 Sieve Analysis • ASTM D698 / D1557 Proctor Compaction

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