Calculate segmental retaining wall blocks, cap stones, base gravel, drainage stone, perforated drain tile, and geogrid reinforcement layers.

Calculate sand volume in cubic yards, tons, and bags online. Free construction sand calculator for pavers, concrete mixes, masonry mortar, and sandboxes.

Calculate room cubic feet (cu ft) and cubic meters (m3) for flat, vaulted, and cathedral ceilings, and determine required ventilation CFM based on air changes (ACH).

Calculate roof squares, pitch multipliers, architectural shingle bundles, synthetic underlayment, ice & water shield, and ridge cap linear feet.

Find roof slope pitch ratios (rise/12), angle degrees, rafter slope factor multipliers, and true surface area.

Compute segmental retaining wall concrete blocks, buried base course, top cap units, geogrid reinforcement, and drainage gravel.

Calculate heating and cooling BTUs, AC system tonnage, sensible/latent heat gain, and ductwork CFM based on square footage, climate zone, and insulation.

Estimate reinforcing steel rebar lengths, grid spacing, overlap splices, tonnage, and tie wire for reinforced concrete.

Calculate pipe internal volume, gallons, liters, and liquid weight online. Free plumbing and civil engineering pipe capacity calculator with standard NPS sizes.

Determine concrete patio pavers, driveway brick stones, crushed aggregate base gravel, bedding sand, and polymeric joint sand.