BuildCalc, a Jobsite Calculator Set

Field notes

The suite divides common construction math into eight focused calculators, from rafter geometry and concrete quantities to drywall sheets, roofing bundles, and waste allowances. Its reference layer names specific conventions rather than stopping at generic estimating language: stair calculations cite IRC R311.7 limits and the Blondel rule, while the rebar section references ASTM A615/A706 and #3–#11 bars. The page states that diagrams and calculations run locally in the browser, though those claims are not independently testable from the extract.