Crawl directory
All 120+ Engineering Specs & Calculators
Every calculator and programmatic spec on SiteSpecCalc, grouped by trade. Each link is one click from this page and two clicks from the homepage.
Concrete & Masonry
Slab volume, thickened-edge footings, rebar grids, bag counts, and ready-mix truck loads with a live footprint diagram.
- Concrete Slab, Rebar, and Bag Calculator
- 10 by 10 ft slab at 4 inches
- 10 by 10 ft slab at 5 inches
- 10 by 10 ft slab at 6 inches
- 10 by 10 ft slab at 8 inches
- 10 by 12 ft slab at 4 inches
- 10 by 12 ft slab at 5 inches
- 10 by 12 ft slab at 6 inches
- 10 by 12 ft slab at 8 inches
- 10 by 14 ft slab at 4 inches
- 10 by 14 ft slab at 5 inches
- 10 by 14 ft slab at 6 inches
- 10 by 14 ft slab at 8 inches
- 10 by 16 ft slab at 4 inches
- 10 by 16 ft slab at 5 inches
- 10 by 16 ft slab at 6 inches
- 10 by 16 ft slab at 8 inches
- 10 by 18 ft slab at 4 inches
- 10 by 18 ft slab at 5 inches
- 10 by 18 ft slab at 6 inches
- 10 by 18 ft slab at 8 inches
- 10 by 20 ft slab at 4 inches
- 10 by 20 ft slab at 5 inches
- 10 by 20 ft slab at 6 inches
- 10 by 20 ft slab at 8 inches
- 10 by 24 ft slab at 4 inches
- 10 by 24 ft slab at 5 inches
- 10 by 24 ft slab at 6 inches
- 10 by 24 ft slab at 8 inches
- 10 by 30 ft slab at 4 inches
- 10 by 30 ft slab at 5 inches
- 10 by 30 ft slab at 6 inches
- 10 by 30 ft slab at 8 inches
- 10 by 8 ft slab at 4 inches
- 10 by 8 ft slab at 5 inches
- 10 by 8 ft slab at 6 inches
- 10 by 8 ft slab at 8 inches
- 10×10 Slab at 4 Inches: Rebar, Bags, and Truck
- 10×10 Slab at 6 Inches: Rebar, Bags, and Truck
- 10×12 Shed Pad: Bags vs Ready-Mix
- 10×20 Slab at 4 Inches: Rebar, Bags, and Truck
- 10×20 Slab at 6 Inches: Rebar, Bags, and Truck
- 12 by 10 ft slab at 4 inches
- 12 by 10 ft slab at 5 inches
- 12 by 10 ft slab at 6 inches
- 12 by 10 ft slab at 8 inches
- 12 by 12 ft slab at 4 inches
- 12 by 12 ft slab at 5 inches
- 12 by 12 ft slab at 6 inches
- 12 by 12 ft slab at 8 inches
- 12 by 14 ft slab at 4 inches
- 12 by 14 ft slab at 5 inches
- 12 by 14 ft slab at 6 inches
- 12 by 14 ft slab at 8 inches
- 12 by 16 ft slab at 4 inches
- 12 by 16 ft slab at 5 inches
- 12 by 16 ft slab at 6 inches
- 12 by 16 ft slab at 8 inches
- 12 by 18 ft slab at 4 inches
- 12 by 18 ft slab at 5 inches
- 12 by 18 ft slab at 6 inches
- 12 by 18 ft slab at 8 inches
- 12 by 20 ft slab at 4 inches
- 12 by 20 ft slab at 5 inches
- 12 by 20 ft slab at 6 inches
- 12 by 20 ft slab at 8 inches
- 12 by 24 ft slab at 4 inches
- 12 by 24 ft slab at 5 inches
- 12 by 24 ft slab at 6 inches
- 12 by 24 ft slab at 8 inches
- 12 by 30 ft slab at 4 inches
- 12 by 30 ft slab at 5 inches
- 12 by 30 ft slab at 6 inches
- 12 by 30 ft slab at 8 inches
- 12 by 8 ft slab at 4 inches
- 12 by 8 ft slab at 5 inches
- 12 by 8 ft slab at 6 inches
- 12 by 8 ft slab at 8 inches
- 12×12 Slab at 4 Inches: Rebar, Bags, and Truck
- 12×12 Slab at 6 Inches: Rebar, Bags, and Truck
- 12×16 Slab at 4 Inches: Rebar, Bags, and Truck
- 12×16 Slab at 6 Inches: Rebar, Bags, and Truck
- 12×20 Slab at 4 Inches: Rebar, Bags, and Truck
- 12×20 Slab at 6 Inches: Rebar, Bags, and Truck
- 12×24 Carport Slab, 5 Inch, 18 Inch Grid
- 12×40 Concrete Driveway Thickness and Cost
- 14 by 10 ft slab at 4 inches
- 14 by 10 ft slab at 5 inches
- 14 by 10 ft slab at 6 inches
- 14 by 10 ft slab at 8 inches
- 14 by 12 ft slab at 4 inches
- 14 by 12 ft slab at 5 inches
- 14 by 12 ft slab at 6 inches
- 14 by 12 ft slab at 8 inches
- 14 by 14 ft slab at 4 inches
- 14 by 14 ft slab at 5 inches
- 14 by 14 ft slab at 6 inches
- 14 by 14 ft slab at 8 inches
- 14 by 16 ft slab at 4 inches
- 14 by 16 ft slab at 5 inches
- 14 by 16 ft slab at 6 inches
- 14 by 16 ft slab at 8 inches
- 14 by 18 ft slab at 4 inches
- 14 by 18 ft slab at 5 inches
- 14 by 18 ft slab at 6 inches
- 14 by 18 ft slab at 8 inches
- 14 by 20 ft slab at 4 inches
- 14 by 20 ft slab at 5 inches
- 14 by 20 ft slab at 6 inches
- 14 by 20 ft slab at 8 inches
- 14 by 24 ft slab at 4 inches
- 14 by 24 ft slab at 5 inches
- 14 by 24 ft slab at 6 inches
- 14 by 24 ft slab at 8 inches
- 14 by 30 ft slab at 4 inches
- 14 by 30 ft slab at 5 inches
- 14 by 30 ft slab at 6 inches
- 14 by 30 ft slab at 8 inches
- 14 by 8 ft slab at 4 inches
- 14 by 8 ft slab at 5 inches
- 14 by 8 ft slab at 6 inches
- 14 by 8 ft slab at 8 inches
- 14×14 Slab at 4 Inches: Rebar, Bags, and Truck
- 14×14 Slab at 6 Inches: Rebar, Bags, and Truck
- 14×24 Slab at 4 Inches: Rebar, Bags, and Truck
- 14×24 Slab at 6 Inches: Rebar, Bags, and Truck
- 16 by 10 ft slab at 4 inches
- 16 by 10 ft slab at 5 inches
- 16 by 10 ft slab at 6 inches
- 16 by 10 ft slab at 8 inches
- 16 by 12 ft slab at 4 inches
- 16 by 12 ft slab at 5 inches
- 16 by 12 ft slab at 6 inches
- 16 by 12 ft slab at 8 inches
- 16 by 14 ft slab at 4 inches
- 16 by 14 ft slab at 5 inches
- 16 by 14 ft slab at 6 inches
- 16 by 14 ft slab at 8 inches
- 16 by 16 ft slab at 4 inches
- 16 by 16 ft slab at 5 inches
- 16 by 16 ft slab at 6 inches
- 16 by 16 ft slab at 8 inches
- 16 by 18 ft slab at 4 inches
- 16 by 18 ft slab at 5 inches
- 16 by 18 ft slab at 6 inches
- 16 by 18 ft slab at 8 inches
- 16 by 20 ft slab at 4 inches
- 16 by 20 ft slab at 5 inches
- 16 by 20 ft slab at 6 inches
- 16 by 20 ft slab at 8 inches
- 16 by 24 ft slab at 4 inches
- 16 by 24 ft slab at 5 inches
- 16 by 24 ft slab at 6 inches
- 16 by 24 ft slab at 8 inches
- 16 by 30 ft slab at 4 inches
- 16 by 30 ft slab at 5 inches
- 16 by 30 ft slab at 6 inches
- 16 by 30 ft slab at 8 inches
- 16 by 8 ft slab at 4 inches
- 16 by 8 ft slab at 5 inches
- 16 by 8 ft slab at 6 inches
- 16 by 8 ft slab at 8 inches
- 16×16 Patio Slab at 4 Inches
- 16×20 Slab at 4 Inches: Rebar, Bags, and Truck
- 16×20 Slab at 6 Inches: Rebar, Bags, and Truck
- 16×24 Slab at 4 Inches: Rebar, Bags, and Truck
- 16×24 Slab at 6 Inches: Rebar, Bags, and Truck
- 18 by 10 ft slab at 4 inches
- 18 by 10 ft slab at 5 inches
- 18 by 10 ft slab at 6 inches
- 18 by 10 ft slab at 8 inches
- 18 by 12 ft slab at 4 inches
- 18 by 12 ft slab at 5 inches
- 18 by 12 ft slab at 6 inches
- 18 by 12 ft slab at 8 inches
- 18 by 14 ft slab at 4 inches
- 18 by 14 ft slab at 5 inches
- 18 by 14 ft slab at 6 inches
- 18 by 14 ft slab at 8 inches
- 18 by 16 ft slab at 4 inches
- 18 by 16 ft slab at 5 inches
- 18 by 16 ft slab at 6 inches
- 18 by 16 ft slab at 8 inches
- 18 by 8 ft slab at 4 inches
- 18 by 8 ft slab at 5 inches
- 18 by 8 ft slab at 6 inches
- 18 by 8 ft slab at 8 inches
- 18×18 Slab at 4 Inches: Rebar, Bags, and Truck
- 18×18 Slab at 6 Inches: Rebar, Bags, and Truck
- 18×30 Slab at 4 Inches: Rebar, Bags, and Truck
- 18×30 Slab at 6 Inches: Rebar, Bags, and Truck
- 20×20 Garage Slab: 4 Inch vs 6 Inch
- 20×24 Slab at 4 Inches: Rebar, Bags, and Truck
- 20×24 Slab at 6 Inches: Rebar, Bags, and Truck
- 20×30 Slab at 4 Inches: Rebar, Bags, and Truck
- 20×30 Slab at 6 Inches: Rebar, Bags, and Truck
- 22×22 Slab at 4 Inches: Rebar, Bags, and Truck
- 22×22 Slab at 6 Inches: Rebar, Bags, and Truck
- 24×24 Slab at 4 Inches: Rebar, Bags, and Truck
- 24×24 Slab at 6 Inches: Rebar, Bags, and Truck
- 24×30 Monolithic Shop Slab with Rebar
- 24×36 Slab at 4 Inches: Rebar, Bags, and Truck
- 24×36 Slab at 6 Inches: Rebar, Bags, and Truck
- 28×40 Slab at 4 Inches: Rebar, Bags, and Truck
- 28×40 Slab at 6 Inches: Rebar, Bags, and Truck
- 30×30 Slab at 4 Inches: Rebar, Bags, and Truck
- 30×30 Slab at 6 Inches: Rebar, Bags, and Truck
- 30×40 Barn Slab at 6 Inches and 4,000 PSI
- 30×50 Slab at 4 Inches: Rebar, Bags, and Truck
- 30×50 Slab at 6 Inches: Rebar, Bags, and Truck
- 32×48 Slab at 4 Inches: Rebar, Bags, and Truck
- 32×48 Slab at 6 Inches: Rebar, Bags, and Truck
- 40×60 Monolithic Shop Slab with Turn-Down Footing
- 6×6 Hot Tub Pad, 6 Inch Reinforced
- 8 by 10 ft slab at 4 inches
- 8 by 10 ft slab at 5 inches
- 8 by 10 ft slab at 6 inches
- 8 by 10 ft slab at 8 inches
- 8 by 12 ft slab at 4 inches
- 8 by 12 ft slab at 5 inches
- 8 by 12 ft slab at 6 inches
- 8 by 12 ft slab at 8 inches
- 8 by 14 ft slab at 4 inches
- 8 by 14 ft slab at 5 inches
- 8 by 14 ft slab at 6 inches
- 8 by 14 ft slab at 8 inches
- 8 by 16 ft slab at 4 inches
- 8 by 16 ft slab at 5 inches
- 8 by 16 ft slab at 6 inches
- 8 by 16 ft slab at 8 inches
- 8 by 18 ft slab at 4 inches
- 8 by 18 ft slab at 5 inches
- 8 by 18 ft slab at 6 inches
- 8 by 18 ft slab at 8 inches
- 8 by 20 ft slab at 4 inches
- 8 by 20 ft slab at 5 inches
- 8 by 20 ft slab at 6 inches
- 8 by 20 ft slab at 8 inches
- 8 by 24 ft slab at 4 inches
- 8 by 24 ft slab at 5 inches
- 8 by 24 ft slab at 6 inches
- 8 by 24 ft slab at 8 inches
- 8 by 30 ft slab at 4 inches
- 8 by 30 ft slab at 5 inches
- 8 by 30 ft slab at 6 inches
- 8 by 30 ft slab at 8 inches
- 8 by 8 ft slab at 4 inches
- 8 by 8 ft slab at 5 inches
- 8 by 8 ft slab at 6 inches
- 8 by 8 ft slab at 8 inches
- 8×10 Generator Pad, 8 Inch, 5,000 PSI
Electrical, EV & Solar
Copper and aluminum wire size, NEC voltage-drop checks, end-of-line voltage, and I²R loss for branch circuits and feeders.
- Wire Size and Voltage Drop Calculator
- 100 Amp Subpanel Feeder: Copper vs Aluminum
- 100A Aluminum Subpanel Feeder at 150 Feet
- 100A Subpanel Feeder Wire Size at 100 Feet
- 100A Subpanel Feeder Wire Size at 50 Feet
- 125A Feeder Wire Size at 60 Feet
- 15 Amp Lighting Run Voltage Drop at 100 Feet
- 150A Aluminum Feeder Wire Size at 100 Feet
- 150A Feeder Wire Size at 80 Feet
- 20 Amp Well Pump Wire Size at 150 Feet
- 200 Amp Main Service Entrance Wire Size
- 200A Service Entrance Wire Size at 25 Feet
- 200A Service Entrance Wire Size at 75 Feet
- 20A Lighting Circuit Wire Size at 150 Feet
- 240 V Mini-Split Heat Pump Wire Gauge
- 30 Amp RV Outlet Wire Gauge and Voltage Drop
- 30A RV Hookup Wire Size at 100 Feet
- 30A RV Hookup Wire Size at 50 Feet
- 32A 230V EV Charger Wire Size at 60 Feet
- 40 Amp Electric Range Wire Size at 40 Feet
- 40A EV Charger Wire Size at 40 Feet
- 480 V Three-Phase 100 Amp Shop Feeder
- 48A Heat Pump Wire Size at 90 Feet
- 48A Tesla Wall Connector Wire Size at 100 Feet
- 48A Tesla Wall Connector Wire Size at 50 Feet
- 48A Tesla Wall Connector Wire Size at 75 Feet
- 50 Amp EV Charger Wire Size at 50, 75, and 100 Feet
- 50A NEMA 14-50 Wire Size at 100 Feet
- 50A NEMA 14-50 Wire Size at 50 Feet
- 60 Amp Detached Garage Subpanel Wire Size
- 60A Subpanel Feeder Wire Size at 75 Feet
- 60A Subpanel Feeder, Copper versus Aluminum
- 80A Garage Feeder, Aluminum, 120 Feet
- Solar String Wire Size, 15A at 100 Feet
- Solar String Wire Size, 20A at 150 Feet
Structural Framing & Wood
IRC stair layout to the sixteenth of an inch, plus common-rafter length, pitch, sheathing, and shingle quantities.
- Stair Stringer Layout Calculator
- Roof Pitch and Common Rafter Calculator
- 10/12 Gable Rafter Length on a 24×40 Building
- 102 Inch Stair Stringer Layout
- 11/12 Gable Rafter Length on a 24×40 Building
- 114 Inch Stair Stringer Layout
- 12/12 Gable on a 30×50 Building
- 12/12 Gable Rafter Length on a 24×40 Building
- 12/12 Pitch Gable Rafter on a 24 Foot Span
- 120 Inch Stair Stringer Layout
- 2/12 Gable Rafter Length on a 24×40 Building
- 3/12 Gable Rafter Length on a 24×40 Building
- 36 Inch Stair Stringer Layout
- 4/12 Gable on a 30×50 Building
- 4/12 vs 8/12 Gable Roof Material Estimator
- 42 Inch Stair Stringer Layout
- 48 Inch Stair Stringer Layout
- 5/12 Gable Rafter Length on a 24×40 Building
- 54 Inch Stair Stringer Layout
- 6/12 Gable on a 30×50 Building
- 6/12 Roof Pitch, Rafter Length, and Shingle Bundles
- 60 Inch Stair Stringer Layout
- 66 Inch Stair Stringer Layout
- 7/12 Gable Rafter Length on a 24×40 Building
- 72 Inch Stair Stringer Layout
- 78 Inch Stair Stringer Layout
- 8/12 Gable on a 30×50 Building
- 84 Inch Stair Stringer Layout
- 9/12 Gable Rafter Length on a 24×40 Building
- 9/12 Pitch Roof on a 30 Foot Span
- 90 Inch Stair Stringer Layout
- 96 Inch Stair Stringer Layout
- Basement Stair Stringer for a 9 Foot Floor-to-Floor Rise
- Deck Stair Stringer Calculator, 36 to 96 Inch Rise
- Deck Stairs, 48 Inch Rise, Three-Stringer Layout
- Interior Stair, 108 Inch Rise, 10 Inch Tread
- Porch Stairs, 24 Inch Rise, IRC Riser Check
- Shed Roof 3/12 Pitch on a 10 by 12 Foot Building
Freight & Logistics
Container and pallet loading, plus delivery planning for cubic yards, bag pallets, rebar weight, wire spools, and roofing bundles.
- Pallet, Container CBM, and Dimensional Weight Calculator
- 12×40 Driveway: Ready-Mix vs Bagged Delivery
- 2×12 Stringer Lumber Haul for a 108 Inch Stair
- 20 ft dry, Euro 1200×800 pallets: Pallet Count, CBM, and Payload
- 20 ft dry, UK 1200×1000 pallets: Pallet Count, CBM, and Payload
- 20 ft dry, US 48×40 pallets: Pallet Count, CBM, and Payload
- 20 ft dry, US pallets, double stacked: Pallet Count, CBM, and Payload
- 40 ft dry, Euro 1200×800 pallets: Pallet Count, CBM, and Payload
- 40 ft dry, Euro pallets, double stacked: Pallet Count, CBM, and Payload
- 40 ft dry, UK 1200×1000 pallets: Pallet Count, CBM, and Payload
- 40 ft dry, US 48×40 pallets: Pallet Count, CBM, and Payload
- 40 ft high cube, Euro pallets, stacked: Pallet Count, CBM, and Payload
- 40 ft high cube, UK pallets, stacked: Pallet Count, CBM, and Payload
- 40 ft high cube, US 48×40 pallets, stacked: Pallet Count, CBM, and Payload
- 40 ft high cube, US pallets, single height: Pallet Count, CBM, and Payload
- 53 ft trailer, Euro 1200×800 pallets: Pallet Count, CBM, and Payload
- 53 ft trailer, UK pallets, stacked: Pallet Count, CBM, and Payload
- 53 ft trailer, US 48×40 pallets: Pallet Count, CBM, and Payload
- 53 ft trailer, US pallets, double stacked: Pallet Count, CBM, and Payload
- Aluminum Feeder Freight for a 200 Amp Service Lateral
- Copper Wire Spool Weight for a 100 Amp, 150 Foot Feeder
- Hot Tub Pad Short-Load Concrete Delivery Fee
- Pallet Count for 80 lb Bags on a 12×16 Pad
- Plywood Sheathing Delivery for a 30×40 Gable
- Ready-Mix Truck Loads for a 20×30 Slab
- Rebar Bundle Weight for a 24×24 Slab Grid
- Shingle Bundle Delivery Weight for a 6/12 Roof