Craft Quantities: construction material calculators

Plan a room, bathroom, deck or fence

plan_room

Read-onlyIdempotent

What materials does a room, bathroom, deck, patio slab, driveway, fence, loft, retaining wall or stair need? Plans one space as the site's planner does, with the reader's finishes (paint, tile, flooring, trim), and returns every row, what it still needs, what is not built and why, and labour hours. Quantities only; it does not size structure.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`kind`	Yes	The kind of space: a room or a bathroom (from its size, doors and windows), or a slab, deck, driveway, fence, loft, retaining wall, exterior wall or stair.
`name`	No
`doors`	No
`scope`	No	Scope question name → answer value, by the planner's ids.
`detail`	No	full (the default): the whole answer. summary: the result lines, the citation line and the page only — fewer tokens to read.	full
`inputs`	No	Branch id → { calculator input id: value in its base unit }.
`intent`	No	A trade, or everything.
`system`	No	The unit system inputs left out open in, and the one the page link opens in. The answer comes in both.	metric
`figures`	Yes	The space's figures, by the planner's ids, each a length with its unit (a room: length, width, height, wallThickness; a fence: length, height; a stair: totalRise, width …).
`windows`	No
`finishes`	No	Surface role → finish id, by the planner's ids.
`leaveOut`	No	Branch ids to leave out.
`inputUnits`	No	Send "base" to pass bare numbers on dimensioned inputs in base units (m, m², L, kg …), as the published test vectors are written. Without it a length, area or volume must carry its unit.