Construction Calculators
Accurate, jobsite-tested material estimators designed for builders, estimators, and DIY homeowners. Calculate exact quantities, translate bulk cubic yards into store-bought bags, preview live CAD stringer blueprints, and export itemized Bills of Materials (BOM).
Concrete Calculator
Calculate concrete for slabs, round post holes, continuous footings, and solid steps. Simultaneously computes cubic yards for ready-mix dispatch and 80 lb / 60 lb / 50 lb retail bag counts.
Mulch & Bulk Aggregates
Convert 2D landscape areas and coverage depth into cubic yards, delivery tonnage, and 2.0 / 3.0 cu ft retail bags. Pre-configured with physical densities for 8 popular materials.
Stair Stringer Calculator
Design code-compliant stair stringers in seconds. Generates exact fractional cuts (1/16"), throat depth validation, incline angles, and a real-time vector architectural CAD blueprint.
Roofing Calculator
Calculate true sloped surface area, roofing squares (100 sq ft), and bundles of shingles (3/square). Includes synthetic underlayment rolls, ice & water shield, ridge caps, and roofing nails.
Drywall Calculator
Estimate sheets of drywall for walls and ceilings minus door and window cutouts. Compares 4x8 ft vs 4x12 ft sheet layouts and calculates ready-mix joint compound mud, tape, and screws.
Bulk Aggregate Density & Weight Reference Table
Physical bulk densities and conversion factors for common building materials (source: ASTM C29 & National Stone, Sand & Gravel Association).
| Material Name | Category | Weight (lbs / yd³) | Weight (Tons / yd³) | Metric Density (kg / m³) | Recommended Depth |
|---|---|---|---|---|---|
| Wood Mulch (Hardwood / Bark / Cedar) | Mulch | 600 lbs | 0.3 tons | 356 kg/m³ | 3 inches |
| Crushed Stone (#57 / Gravel) | Gravel | 2,700 lbs | 1.35 tons | 1602 kg/m³ | 4 inches |
| Pea Gravel (#8) | Gravel | 2,600 lbs | 1.3 tons | 1542 kg/m³ | 3 inches |
| Masonry & Concrete Sand | Sand | 2,700 lbs | 1.35 tons | 1602 kg/m³ | 2 inches |
| Screened Topsoil | Soil | 2,200 lbs | 1.1 tons | 1305 kg/m³ | 4 inches |
| Fill Dirt / Subsoil | Soil | 2,000 lbs | 1 tons | 1186 kg/m³ | 6 inches |
| River Rock / Cobblestone (1"-3") | Stone | 2,800 lbs | 1.4 tons | 1661 kg/m³ | 3 inches |
| Hot-Mix Asphalt (HMA) | Asphalt | 3,900 lbs | 1.95 tons | 2314 kg/m³ | 2.5 inches |