Quantities you can audit, ballpark material costs from national averages, and every formula traced to a published standard — ACI, ASTM, IRC, TCNA. No signup, no sales calls.
Most calculators hand you a number with no way to check it. We show the formula, name the standard, and apply the right waste factor.
Every constant tied to ACI, ASTM, IRC, or TCNA — the math is shown, not hidden.
National-average material prices from public retail sources — each shown with its source and the date we last checked it.
Correct waste factor per material and layout, so your order matches the jobsite.