Construction Calculators
Free, fast, and accurate material estimators for concrete, roofing, lumber, landscaping, and more. No sign-up required.
Concrete & Masonry
Concrete Calculator
Calculate how much concrete you need for slabs, footings, columns, and more.
Brick Calculator
Calculate how many bricks you need for walls, patios, and walkways.
Retaining Wall Calculator
Calculate blocks, gravel, and materials for a retaining wall.
Paver Calculator
Calculate how many pavers you need for patios, walkways, and driveways.
Rebar Calculator
Calculate rebar quantity, spacing, and weight for concrete slabs and footings.
Landscaping
Mulch Calculator
Calculate how many cubic yards or bags of mulch you need for your garden beds.
Gravel Calculator
Calculate how much gravel you need in tons and cubic yards for driveways, paths, and landscaping.
Sand Calculator
Calculate how much sand you need in tons and cubic yards.
Sod Calculator
Calculate how many rolls or pallets of sod you need for your lawn.
Topsoil Calculator
Calculate how much topsoil you need in cubic yards and tons.
Roofing
Framing & Structure
Interior
Paint Calculator
Calculate how many gallons of paint you need for walls, ceilings, and rooms.
Tile Calculator
Calculate how many tiles you need for floors, walls, and backsplashes.
Drywall Calculator
Calculate the number of drywall sheets, joint compound, and tape needed.
Flooring Calculator
Calculate how much flooring material you need — hardwood, laminate, vinyl, or LVP.
Insulation Calculator
Calculate batts or rolls of insulation needed for walls, attics, and floors.
Outdoor & Fencing
HVAC
BTU Calculator
Calculate BTUs needed to heat or cool a room based on size, insulation, and climate.
AC Tonnage Calculator
Calculate the right AC unit size in tons for your home or room.
HVAC Duct Size Calculator
Calculate the right duct diameter based on CFM airflow requirements.
Heat Loss Calculator
Estimate BTU/hr heat loss through walls, windows, and ceilings for furnace sizing.
Superheat & Subcooling Calculator
Calculate superheat and subcooling to verify refrigerant charge levels.
Electrical
Ohm's Law Calculator
Calculate voltage, current, resistance, and power from any two known values.
Voltage Drop Calculator
Calculate voltage drop across a wire run based on distance, current, and wire gauge.
Wire Gauge Calculator
Determine the correct wire size based on amperage, distance, and voltage.
Circuit Breaker Size Calculator
Determine the correct breaker size for a circuit based on load and NEC rules.
Electrical Load Calculator
Calculate total electrical demand to size your home's service panel.
Plumbing
Water Heater Size Calculator
Size a tank or tankless water heater based on household demand.
Pipe Size Calculator
Calculate the right water supply pipe diameter for your flow rate needs.
Drain Slope Calculator
Calculate the required fall for drain pipes based on pipe size and run length.
Sump Pump Size Calculator
Calculate the required GPM and horsepower for a sump pump.
Fixture Unit (DFU) Calculator
Calculate total drainage fixture units to size drain and vent pipes.
Water Pressure Loss Calculator
Calculate pressure loss through pipe runs to verify adequate fixture pressure.
Why Use CalcHub?
Instant Results
Enter your dimensions and get material estimates immediately. No waiting, no sign-up.
Accurate Formulas
Industry-standard calculations with waste factors built in so you order the right amount.
Save Money
Stop over-ordering materials or making extra trips. Get it right the first time.