About CubicYardKit
CubicYardKit was engineered to bring commercial-grade volumetric calculations, verified aggregate densities, and transparent project takeoff planning to US homeowners, earthwork contractors, and landscapers.
Why Standard Calculators Cause Jobsite Shortages
Every construction season, thousands of projects suffer costly material shortages, emergency short-load surcharges, or massive piles of leftover gravel. The primary root cause is surprisingly simple: unit inconsistency and arbitrary density assumptions.
On job sites, lengths and widths are surveyed in feet, while slab depths and gravel layers are measured in inches. Multiplying length by width by depth directly without normalizing units introduces an immediate 1,200% error. Furthermore, many generic online tools fabricate an arbitrary conversion (such as claiming all gravel weighs 1.5 tons per yard or all concrete bags yield the same volume), ignoring geotechnical compaction and moisture content.
CubicYardKit was built to eliminate this guesswork. We provide mathematically rigorous calculation engines built upon verified physical material densities, standard ASTM bulk weights, and transparent waste allowances.
Engineered to US Trade & Code Standards
Our calculation formulas and reference databases are directly cross-referenced against established American industry benchmarks:
Standard specifications for concrete aggregates and graded crushed stone (#57 stone at 2,700 lb/yd³, pea gravel at 2,800 lb/yd³, crusher run at 3,000 lb/yd³).
Ready-mix batch tolerance guidelines, 90-minute discharge limits, and pre-mixed bag yields (80-lb bag = 0.60 cu ft; 60-lb bag = 0.45 cu ft).
Standard CMU hollow block geometry (1.125 blocks/sq ft with 3/8" mortar joint), ASTM C270 mortar schedules, and core grout fill volume.
Interlocking Concrete Pavement Institute multi-layer strata specifications (sub-base aggregate, bedding sand, edge restraints) and foundation drainage slope codes.
The CubicYardKit Guarantees
Zero Fabricated Densities
We clearly document the verified laboratory weight of every material in pounds per cubic yard and tons per cubic yard, while giving contractors the freedom to input regional quarry scale numbers.
Mathematical Proofs & Formulas
We don't hide our calculations behind a black box. Every calculator page includes step-by-step mathematical proofs, worked trade examples, and formula derivations.
100% Client-Side Privacy
Your project takeoffs and bills of materials are saved directly in your browser's LocalStorage. No user accounts, passwords, or server database tracking required.
Have Questions or Suggestions?
Our engineering team continuously refines density tables and regional aggregate data based on contractor feedback. If you have questions, notice a calculation discrepancy, or want to suggest a new material preset, please reach out to our team: