BuildNumeris: Construction Math With the Assumptions Left In

Why it surfaced

BuildNumeris makes its estimates reviewable: formulas, unit conversions, waste allowances, and assumptions are presented rather than hidden behind a result. It also draws a useful boundary between quantity estimating and structural design, a small sign of unusually responsible calculator copy.

A free library of construction quantity and geometry calculators for concrete, rebar, gravel, paint, roofing, framing, fencing, and more.