Construction Calculators
Concrete, flooring, roofing, plumbing, electrical, HVAC, and structural calculators.
Concrete Volume Calculator
Calculate the volume of concrete needed for any project. Enter length, width, and depth in feet to get results in cubic feet and cubic yards.
Concrete Slab Calculator
Calculate exactly how much concrete you need for a rectangular slab. Enter dimensions including thickness in inches to get cubic yards.
Concrete Footing Calculator
Calculate concrete needed for continuous footings. Enter the footing length, width, and depth to determine cubic yards of concrete required.
Concrete Block Calculator
Calculate how many concrete blocks (CMU) you need for a wall. Enter wall dimensions and block size to get the number of blocks required.
Concrete Bag Calculator
Calculate how many bags of premixed concrete you need. Supports 80 lb, 60 lb, and 40 lb bags with accurate coverage values.
Gravel Calculator
Calculate how much gravel you need in cubic yards and tons for driveways, paths, and landscaping projects.
Asphalt Calculator
Calculate how much asphalt you need in tons for driveways, parking lots, and roads. Enter dimensions and thickness for accurate tonnage.
Sand Calculator
Calculate how much sand you need in cubic yards and tons for construction, landscaping, and fill projects.
Brick Calculator
Calculate how many bricks you need for a wall or project. Accounts for mortar joints and waste factor.
Drywall Calculator
Calculate how many sheets of drywall you need for walls and ceilings. Accounts for standard 4x8 sheet coverage and waste.
Paint Coverage Calculator
Calculate how much paint you need based on wall area, coverage rate, and number of coats. Quick and easy paint estimator.
Paint Gallons Calculator
Calculate how many gallons of paint you need with automatic deductions for doors and windows. Includes wall perimeter, height, and coat settings.
Tile Calculator
Calculate how many tiles you need for a floor or wall. Enter the area and tile size, and get the tile count including waste.
Grout Calculator
Calculate how much grout you need based on tile size, grout joint width, and tile thickness. Get results in pounds of grout.
Carpet Calculator
Calculate how much carpet you need in square feet and square yards. Essential for pricing carpet, which is typically sold by the square yard.
Hardwood Flooring Calculator
Calculate how much hardwood flooring you need in square feet with waste factor. Includes a cost estimate based on price per square foot.
Deck Board Calculator
Calculate how many deck boards you need based on deck dimensions, board width, and spacing. Includes waste for cuts.
Deck Footing Calculator
Calculate how many footings you need for a deck based on beam span, joist span, and footing spacing requirements.
Roof Shingle Calculator
Calculate how many shingles (squares and bundles) you need for a roof. Enter the roof area to get the number of squares and bundles.
Roof Pitch Calculator
Calculate roof pitch as rise/run, angle in degrees, and pitch factor. Enter the rise and run to determine your roof slope.
Roof Area Calculator
Calculate actual roof surface area from building footprint and roof pitch. Uses the pitch multiplier for accurate results.
Siding Calculator
Calculate how much siding you need for a house. Deducts for windows and doors, and accounts for waste.
Insulation Calculator
Calculate how much insulation you need in batts or rolls. Enter wall or ceiling area, stud spacing, and get the number of batts or rolls required.
Rebar Calculator
Calculate how many pieces of rebar you need for a concrete slab or footing based on spacing and dimensions.
Rebar Spacing Calculator
Calculate rebar spacing, number of bars, and layout for slabs, walls, and footings. Determine bar counts for a given spacing.
Lumber Calculator
Calculate total board feet and piece counts for lumber orders. Enter the dimensions and quantity of boards needed.
Board Foot Calculator
Calculate board feet for lumber. Essential for woodworking and buying hardwood lumber priced by the board foot.
Beam Load Calculator
Calculate the load per linear foot on a beam, total load, and required support reactions. Helps determine beam sizing requirements.
Wall Framing Calculator
Calculate how many studs you need for wall framing based on wall length and stud spacing (16" or 24" on center).
Stair Stringer Calculator
Calculate stair dimensions including number of steps, riser height, and tread depth. Ensures code-compliant stairs.
Fence Calculator
Calculate how many fence posts, rails, and pickets you need for your fence project.
Mulch Calculator
Calculate how much mulch you need for your landscaping project in cubic yards and bags.
Soil Calculator
Calculate how much topsoil or fill dirt you need for raised beds, gardens, and grading projects.
Paver Calculator
Calculate how many pavers you need based on your patio or walkway dimensions and paver size.
Retaining Wall Calculator
Calculate how many retaining wall blocks you need based on wall dimensions and block size.
Square Footage Calculator
Calculate the square footage of a room, house, or area from length and width measurements.
Cubic Yard Calculator
Convert dimensions in feet and inches to cubic yards for material ordering.
Plywood Calculator
Calculate how many plywood sheets you need for floors, walls, or roofing.
HVAC BTU Calculator
Calculate the BTU capacity needed for heating or cooling a room based on square footage and conditions.
Electrical Load Calculator
Calculate electrical load in watts and amps for circuit sizing and panel capacity planning.
Pipe Flow Rate Calculator
Estimate the volumetric flow rate through a pipe given its inside diameter and the velocity of the fluid.
Pipe Sizing Calculator
Determine the minimum pipe diameter required for a given flow rate and maximum velocity.
Water Pressure Drop Calculator
Estimate friction-related pressure drop in a straight pipe using the Darcy-Weisbach simplified approach.
Drainage Slope Calculator
Calculate the required drop in elevation over a given run to achieve the correct drainage slope for waste pipes.
Water Heater Sizing Calculator
Estimate the tank size and BTU input needed for a residential water heater based on household demand.
Fixture Unit Calculator
Add up water supply fixture units (WSFU) for residential or commercial buildings to determine pipe sizing requirements.
Pipe Friction Loss Calculator
Calculate head loss due to pipe friction using the Hazen-Williams equation for water supply systems.
Pump Head Calculator
Calculate the total dynamic head a pump must overcome, combining static lift, friction losses, and pressure requirements.
Sewage Flow Rate Calculator
Estimate daily sewage discharge from a building based on occupancy and per-capita wastewater generation.
Well Pump Sizing Calculator
Size a submersible well pump by computing horsepower from flow rate and total dynamic head.
Wire Gauge Calculator
Determine the minimum wire gauge (AWG) for a circuit based on amperage and run length to keep voltage drop within limits.
Circuit Breaker Sizing Calculator
Calculate the correct breaker size for a circuit based on connected load, voltage, and NEC safety factor.
Voltage Drop Calculator
Calculate exact voltage drop across a copper conductor run given amperage, distance, and wire gauge area.
Conduit Fill Calculator
Check whether a set of conductors fits within a conduit according to NEC fill percentage rules.
Electrical Panel Load Calculator
Sum all branch circuit loads to verify your electrical panel has sufficient capacity for the total demand.
Lighting Layout Calculator
Determine the number of light fixtures needed for a room using the lumen method and desired foot-candle level.
Outlet Spacing Calculator
Determine the number of electrical outlets needed along walls per NEC spacing requirements.
Generator Sizing Calculator
Estimate the generator size in kilowatts needed to power selected loads during an outage.
Ground Rod Depth Calculator
Calculate the grounding resistance of a single rod driven into soil, based on rod dimensions and soil resistivity.
Cable Tray Fill Calculator
Determine the fill ratio for a cable tray based on cable cross-sections and tray dimensions.
Topsoil Volume Calculator
Calculate how many cubic yards of topsoil you need for garden beds, lawns, or fill based on area and desired depth.
Mulch Volume Calculator
Compute the amount of mulch required for beds of any shape, with output in cubic yards and standard bag counts.
Gravel Bed Calculator
Calculate the amount of gravel needed for a bed, path, or drainage layer in cubic yards and tons.
Landscape Retaining Wall Calculator
Estimate the number of retaining wall blocks needed for a landscape wall of given length and height.
Paver Area Calculator
Calculate the number of pavers needed for a patio, walkway, or driveway based on paver dimensions and total area.
Fence Post Spacing Calculator
Determine the optimal number of fence posts and equal spacing for a fence line of any length.
Irrigation Zone Calculator
Determine how many irrigation zones are needed based on available water flow and sprinkler head demand.
Drainage Gravel Calculator
Calculate gravel needed for a French drain or drainage trench, accounting for pipe displacement.
Lawn Seed Coverage Calculator
Calculate the amount of grass seed needed for a new lawn or overseeding based on area and application rate.
Sod Area Calculator
Calculate the number of sod rolls or pallets needed for a new lawn installation.
Duct Sizing Calculator
Calculate the required duct diameter for a given airflow and maximum velocity using the equal friction method.
Air Flow Rate Calculator
Calculate the required CFM (cubic feet per minute) airflow for heating or cooling a room based on its volume and air changes per hour.
Heat Loss Calculator
Estimate building heat loss in BTU per hour based on envelope area, insulation R-value, and temperature difference.
Heat Gain Calculator
Estimate summer cooling load (heat gain) for a space based on area, solar exposure, and internal heat sources.
Ventilation Rate Calculator
Calculate the required outdoor air ventilation rate for a space per ASHRAE Standard 62.1 guidelines.
Refrigerant Charge Calculator
Estimate the additional refrigerant charge needed for an AC system based on line set length beyond the factory charge.
HVAC Filter Sizing Calculator
Determine the filter face area and quantity needed for an HVAC system based on airflow and maximum face velocity.
Duct Velocity Calculator
Calculate the air velocity inside a duct of known size carrying a specified airflow.
Return Air Sizing Calculator
Calculate the size of return air grilles and ducts needed to avoid excessive pressure drop in an HVAC system.
Exhaust Fan Sizing Calculator
Calculate the exhaust fan CFM rating needed for bathrooms, kitchens, or utility rooms based on room volume and required air changes.
Beam Deflection Calculator
Calculate the maximum deflection of a simply supported beam under a uniform distributed load.
Column Load Calculator
Estimate the axial load capacity of a short column based on its cross-sectional area and allowable compressive stress.
Foundation Footing Calculator
Determine the minimum footing size needed to support a column or wall load based on soil bearing capacity.
Rebar Layout Spacing Calculator
Calculate the number of rebar pieces and actual spacing for a slab or wall of known dimensions.
Shear Force Calculator
Calculate the maximum shear force and reactions for a simply supported beam with a uniform distributed load.
Bending Moment Calculator
Calculate the maximum bending moment for a simply supported beam with uniform or point load.
Anchor Bolt Spacing Calculator
Calculate the number of anchor bolts and their spacing for a sill plate on a foundation wall.
Weld Length Calculator
Calculate the minimum fillet weld length required to carry a given load based on weld size and allowable shear stress.
Steel Beam Weight Calculator
Calculate the total weight of a steel beam from its weight-per-foot designation and length.
Concrete Column Calculator
Calculate the concrete volume and rebar requirements for a rectangular or round concrete column.
Staircase Riser Calculator
Calculate the number of risers, riser height, and tread depth for a staircase given the total rise and preferred step dimensions.
Door Rough Opening Calculator
Calculate the rough opening dimensions needed for a door based on the nominal door size and framing clearances.
Window Header Size Calculator
Determine the required header depth for a window or door opening based on the span width and the number of supported floors.
Baseboard Length Calculator
Calculate the total linear feet of baseboard trim needed for a room, accounting for door openings and a waste factor.
Crown Molding Calculator
Calculate the total linear feet of crown molding needed for a room, including a waste factor for miter cuts at corners.
Wallpaper Rolls Calculator
Calculate the number of wallpaper rolls needed for a room based on wall dimensions, pattern repeat, and window/door deductions.
Ceiling Grid Calculator
Calculate the main runners, cross tees, wall angle, and tiles needed for a suspended ceiling grid based on room dimensions.
Drop Ceiling Calculator
Estimate the total cost and material quantities for a drop ceiling project including tiles, grid components, and hanger wire.
Acoustic Panel Calculator
Calculate the number of acoustic panels needed to treat a room for sound absorption based on wall area and target coverage percentage.
Gutter Length Calculator
Calculate the total linear feet of gutters and number of downspouts needed based on roof edge measurements and building dimensions.