161 construction calculators that get the numbers right.
Concrete, framing, flooring, roofing, electrical, plumbing, HVAC and more. No signup, no paywalls.
Browse · 10 topics
Concrete & Materials 19 calculators
- Asphalt CalculatorTons of asphalt for a driveway
- Brick CalculatorBricks and mortar for a wall
- CMU Block CalculatorCMU blocks, mortar and grout
- Concrete CalculatorCubic yards and bags of concrete
- Concrete Mix Design CalculatorConcrete mix design by target PSI
- Cubic Yard CalculatorCubic yards of any material
- Cut & Fill CalculatorCut and fill earthwork volumes
- Demolition Waste CalculatorWeight and volume of demo debris
- Dumpster Size CalculatorWhat size dumpster to rent
- Footing CalculatorConcrete and rebar for footings
- Gravel & Aggregate CalculatorTons of gravel and stone
- Mortar Mix CalculatorBags of mortar for a wall
- Mulch CalculatorCubic yards of mulch you need
- Post Hole CalculatorConcrete bags for post holes
- Rebar CalculatorRebar quantity, weight and cost
- Sand CalculatorCubic yards and tons of sand
- Sealant and Caulk CalculatorTubes of caulk for your joints
- Sonotube Concrete CalculatorConcrete to fill a sonotube
- Trench CalculatorTrench excavation volume
Framing & Structural 15 calculators
- ADA Ramp CalculatorADA ramp length and landings
- Board Foot CalculatorBoard feet in a lumber order
- Column Load CalculatorColumn load capacity
- Deck Load Capacity CalculatorCan your deck hold a hot tub?
- Elevation Grade CalculatorGrade between two elevations
- Joist Span CalculatorMaximum joist span
- Miter Angle Cut CalculatorCompound miter and bevel angles
- Snow Load CalculatorRoof snow load
- Spiral Staircase CalculatorTreads and rise for a spiral stair
- Staircase CalculatorStair rise, run and stringers
- Structural Beam Sizing CalculatorSize a wood beam
- Structural Load CalculatorDead, live, snow and wind loads
- Stud & Wall Framing CalculatorStuds, headers and plates for a wall
- Vertical Curve CalculatorElevations on a vertical curve
- Wind Load CalculatorWind load on a building
Interior & Finishes 26 calculators
- Baluster Spacing CalculatorBaluster count and spacing
- Baseboard & Trim CalculatorLinear feet of baseboard and trim
- Board and Batten CalculatorBatten spacing for an accent wall
- Carpet CalculatorSquare yards of carpet
- Closet Shelving CalculatorShelving and rod for a closet
- Countertop CalculatorCountertop square footage and cost
- Crown Molding CalculatorCrown molding and miter angles
- Door Rough Opening CalculatorDoor rough opening size
- Door Sizing CalculatorDoor opening, header and clearances
- Drop Ceiling CalculatorTiles and grid for a drop ceiling
- Drywall CalculatorDrywall sheets, mud and screws
- Epoxy Garage Floor CalculatorEpoxy for a garage floor
- Flooring CalculatorFlooring material and cost
- Grout Coverage CalculatorPounds of grout for a tile job
- Joint Compound CalculatorJoint compound and tape
- Paint CalculatorGallons of paint for a room
- Shiplap CalculatorShiplap boards for a wall
- Soundproofing CalculatorSoundproofing and STC rating
- Thinset Mortar CalculatorBags of thinset for tile
- Tile CalculatorTiles, adhesive and grout
- Trim Miter Angle CalculatorMiter angle for any corner
- Wainscoting CalculatorPanels, rails and stiles for wainscoting
- Wallpaper CalculatorRolls of wallpaper you need
- Weatherstripping CalculatorWeatherstripping and savings
- Window Energy CalculatorHeat loss cost through windows
- Window U-Factor CalculatorCompare window U-factors
Roofing 6 calculators
Roofing overview
- Birdsmouth Cut CalculatorBirdsmouth cut for a rafter
- Gutter Size CalculatorGutter and downspout size
- Roof Pitch CalculatorRoof pitch and rafter length
- Roof Truss CalculatorRoof truss member lengths
- Roofing CalculatorRoofing squares, materials and cost
- Shingles CalculatorShingle bundles for your roof
Outdoor & Landscaping 12 calculators
- Artificial Turf Cost CalculatorArtificial turf cost vs. grass
- Basic Roofing CalculatorShingles for a simple roof
- Decking CalculatorDeck boards, posts and hardware
- Fence CalculatorFence materials and cost
- Grass Seed CalculatorGrass seed for your lawn
- Irrigation CalculatorSprinkler zones and water needs
- Patio CalculatorMaterials for a patio
- Paver CalculatorPavers and base for a patio
- Retaining WallBlocks for a retaining wall
- Shed CalculatorLumber and materials for a shed
- Sod CalculatorPallets of sod you need
- Topsoil CalculatorCubic yards of topsoil
Electrical 17 calculators
Electrical overview
- Circuit Breaker Size CalculatorThe right breaker size
- Conduit Fill CalculatorConduit fill percentage
- Electrical Panel Load CalculatorElectrical panel load
- Electrical Service Upgrade CalculatorDo you need a 200-amp upgrade?
- Electricity CostMonthly electricity cost
- EV Charger Sizing CalculatorSize an EV charger circuit
- Generator Sizing CalculatorBackup generator size you need
- Ground Fault CalculatorWhere GFCI and AFCI are required
- LED ResistorResistor for an LED circuit
- Lighting Layout CalculatorHow many recessed lights, and spacing
- Ohm's LawOhm's law: volts, amps and ohms
- Resistor Color CodeRead resistor color bands
- Solar Panel Size CalculatorHow many solar panels you need
- Voltage DividerDesign a voltage divider
- Voltage Drop CalculatorVoltage drop over a wire run
- Watts to Amps CalculatorConvert watts and amps
- Wire SizeThe right wire gauge
Plumbing & Pools 16 calculators
- Drain Slope CalculatorDrain pipe slope and code check
- Fire Flow CalculatorRequired fire flow for a building
- Fixture Unit CalculatorFixture units to size pipes
- French Drain CalculatorFrench drain materials
- GPM Flow Rate CalculatorFlow rate through a pipe
- Pipe Size CalculatorPipe diameter for supply or drain
- Pond Liner CalculatorPond liner size and pump
- Pool Chemical Dosing CalculatorPool chemical doses
- Pool Pump Sizing CalculatorPool pump size and running cost
- Pool Volume CalculatorGallons in your pool
- Rolling Offset CalculatorRolling offset travel and run
- Septic Tank Size CalculatorSeptic tank and drain field size
- Sump Pump Sizing CalculatorSump pump flow and horsepower
- Water Heater Size CalculatorWater heater size for your home
- Water Pressure CalculatorWater pressure and friction loss
- Water Softener Sizing CalculatorWater softener grain capacity
HVAC & Insulation 18 calculators
- AC BTU CalculatorAC size in BTUs for a room
- AC Tonnage CalculatorAC tonnage for your home
- Air Changes Per Hour CalculatorAir changes per hour in a room
- Blown-In Insulation CalculatorBags of blown-in insulation
- Boiler Size CalculatorBoiler size for your home
- Energy Savings EstimatorSavings from insulation upgrades
- Furnace Sizing CalculatorFurnace or heat pump size
- Heat Loss CalculatorHeat loss through walls and windows
- Heat Pump vs Gas Furnace Operating Cost CalculatorHeat pump vs. gas furnace cost
- HVAC Duct Sizing CalculatorSize round and rectangular ducts
- HVAC Load Calculator (Manual J)Heating and cooling load (Manual J)
- Insulation R-Value CalculatorR-value you need by climate
- Mini-Split Sizing CalculatorMini-split size for a room
- Radiant Floor Heating CalculatorSize radiant floor heating
- Refrigerant Charge CalculatorRefrigerant charge for a split system
- Spray Foam Insulation CalculatorSpray foam board feet and cost
- Vapor Barrier CalculatorVapor barrier for crawl spaces
- Ventilation Rate CalculatorRequired ventilation (ASHRAE 62)
Project Costs & Planning 6 calculators
- ADU Cost CalculatorWhat it costs to build an ADU
- Building Permit Fee EstimatorEstimate your building permit fee
- Change Order CalculatorThe full cost of a change order
- Home Remodel ROI CalculatorWhich remodels pay back at resale
- Job Costing CalculatorPrice a job with labor and markup
- Square Footage CalculatorSquare footage of any room or shape
Metalworking & Weights 26 calculators
- Aluminum Weight CalculatorWeight of aluminum stock
- Angle Iron Weight CalculatorWeight of steel angle iron
- Bend Allowance CalculatorBend allowance for sheet metal
- Bend Deduction CalculatorBend deduction for sheet metal
- Bolt Circle Layout CalculatorHole positions on a bolt circle
- Copper Weight CalculatorWeight of copper stock
- Countersink Depth CalculatorCountersink depth for flush screws
- Feed Rate Calculator (Machining)Machining feed rate (IPM)
- Flat Bar Weight CalculatorWeight of flat bar stock
- K-Factor Calculator (Sheet Metal)K-factor for a sheet metal bend
- Log Weight CalculatorWeight of a log
- Lumber Weight CalculatorWeight of dimensional lumber
- Material Removal Rate CalculatorMaterial removal rate for milling
- Metal Weight CalculatorWeight of any metal shape
- Pipe Weight CalculatorWeight of metal pipe or tube
- Pitch Diameter CalculatorThread pitch diameter
- Punch Force CalculatorForce to punch sheet metal
- Sheet Metal Weight CalculatorWeight of a sheet metal panel
- Spindle Speed CalculatorSpindle RPM from surface speed
- Steel Plate Weight CalculatorWeight of a steel plate
- Steel Weight CalculatorWeight of steel bar and beams
- Stone Weight CalculatorWeight of stone slabs or gravel
- Tap Drill Size CalculatorTap drill size for a thread
- Thread Pitch CalculatorTPI to metric pitch
- Thread Size CalculatorLook up thread dimensions
- True Position CalculatorGD&T true position of a hole