Eco & Natural Building Calculators
Estimate materials for low-carbon, natural building methods — adobe brick, cob, rammed earth, earthbag, bamboo, and stone masonry — along with lime plaster and thatch roofing quantities.
Use the embodied-carbon estimator and passive cooling tools to design a comfortable, sustainable home that suits local materials and climate.
Cob House Material Calculator | Clay, Sand, Straw
Estimate clay, sand, straw, and water quantities for a cob wall from length, height, thickness, and opening area. Free natural-building calculator.
Adobe Brick Calculator | Sun-Dried Mud Bricks
Compute the number of sun-dried adobe bricks plus soil, sand, straw, and water totals from wall area, brick dimensions, and joint thickness.
Rammed Earth Wall Calculator | Soil & Stabilizer
Estimate compacted soil, lime or cement stabilizer mass, and worker-days for a rammed-earth wall from length, height, thickness, and stabilizer percentage.
Bamboo House Material Calculator | Pole & Cladding
Estimate structural bamboo poles, split-bamboo wall cladding area, and borax-boric treatment chemical from floor plan area and bamboo species.
Thatch Roof Calculator | Bundles, Lifespan
Estimate thatch bundles, expected lifespan, and maintenance schedule for a straw, palm, or grass roof from plan area and pitch percentage.
Lime Plaster Calculator | Lime, Sand, Water
Estimate hydrated lime, sand, and water for a lime plaster from wall area, plaster thickness, and lime-to-sand ratio. Defaults to a 1:3 mix at 12 mm.
Earthbag House Calculator | Bag, Soil, Barbed Wire
Estimate bag count, soil volume, and barbed-wire metres for an earthbag wall from wall geometry and tamped bag dimensions. Free natural-building calculator.
Stone Masonry Calculator | Random Rubble vs Coursed
Estimate stone volume, mortar volume, and labour-days for a stone masonry wall, with separate factors for random rubble and coursed bond types.
Embodied Carbon Estimator (kgCO2e) | ICE Database v3
Estimate total embodied carbon for a construction project from a list of materials and quantities. Sourced from ICE Database v3 cradle-to-gate factors.
Passive Cooling & Heating Estimator (Wall Materials)
Estimate thermal mass, breathability, and seasonal comfort for any wall material, thickness, climate zone, and orientation. Eco-friendly home design.