Guide / 2026-09-05
Concrete Slab Thickness: How Deep Should It Be?
Calculate slab volume at several depths, add a stated waste allowance, and know which structural decisions a quantity estimate cannot make.
Read guide →Field guides / 03 articles
Measure the job. Then choose the tool.
Short, source-linked explanations for the decisions that sit between a tape measure and a material order.
Guide / 2026-09-05
Concrete Bags vs. Ready-Mix Concrete
Compare concrete bag counts with cubic-yard ordering, using cited bag yields, waste, handling limits, and the point where a truck quote is practical.
Read guide →Guide / 2026-09-05
How to Read a Deck Joist Span Table
Use species, grade, size, spacing, loads, service, treatment, use case, and code edition together when checking a deck joist span.
Read guide →Looking for the older calculator archive? Browse the legacy guide archive.