The construction calculator built for the way crews actually work — fast, thumb-friendly, and accurate. Concrete, rebar, roof, stairs, earthwork, and aggregate, plus a full scientific calculator drawer with circle math, square-up, and unit conversions.
Cubic yards, truck loads, bag count, and waste rolled in.
#3 through #11, spacing on center, total LF and weight in lb / tons.
Standard rise/run notation from 4/12 through 24/12.
Code-aware: flags risers above 7-3/4" and treads below 10".
Swell and shrinkage factors with truck-load conversions.
Tons or cubic yards with editable per-material density.