Construction & Home calculators
Choose a task below. Check each calculator’s assumptions and units before using its result.
Air Release Valve Calculator - Vacuum Breaker Sizing
Size air/vacuum relief valves to prevent catastrophic pipeline structural buckling collapse during rapid draining or line breaks per AWWA M51 and Timoshenko shell theory.
Architectural Glass Weight Calculator - Crane Rigging Lbs
Determine exact panel dead weight in lbs and kg, vacuum suction cup lifter requirements, and structural dead-load anchor reaction forces for glazing installation.
Asphalt Paving Calculator - Hot Mix Tons & Square Feet
Determine hot mix asphalt (HMA) tonnage and material costs for driveways, roadways, and parking areas.
Baseboard Trim Calculator - Linear Feet & Miter Cuts
Determine linear footage of baseboard, door opening deductions, stock piece counts, and cutting waste allowances.
Carpet Calculator - Square Yards & Roll Seam Waste
Determine exact carpet square yards, 12-foot vs 15-foot roll cuts, pile direction matching, and padding requirements.
Cathodic Protection Calculator - Current Requirement Sizing
Calculate total cathodic protection DC current demand (Amps), total pipe surface area, and coating degradation breakdown factors per NACE SP0169 and ISO 15589-1.
Chicken Coop Size Calculator - Flock Space & Roost
Determine internal coop square footage, outdoor predator-proof run dimensions, roost bar length, and nesting box counts.
Commercial Laundry Calculator - Water & Gas Cost per Lb
Determine water consumption in gallons per pound, boiler natural gas therms, electric dryer power, and total utility cost per pound of linen processed.
Concrete Block Calculator - CMU Count & Mortar Bags
Determine exact 8×8×16 CMU block counts, Type S mortar bags, and core grout fill for structural masonry walls.
Concrete Footing Calculator - Sonotube Post Bags & Yards
Calculate concrete volume in cubic yards and determine 80lb and 60lb premix bag counts for cylindrical Sonotubes and square post piers.
Curtain Wall Wind Load Calculator - Deflection & Mullion
Determine required aluminum mullion moment of inertia (Ix), allowable deflection limits (L/175 and L/240), and bending stress under ASCE 7 wind pressures.
Dry Cleaning Solvent Calculator - Perc Mileage & Loss
Calculate solvent mileage efficiency (lbs of clothes cleaned per gallon), distillation still bottoms waste, and EPA NESHAP regulatory compliance.
Drywall Calculator - Sheet Count, Screws & Joint Mud
Determine 4×8 or 4×12 drywall sheet counts, joint compound mud buckets, screw counts, and tape rolls for walls and ceilings.
Electric Fence Charger Calculator - Joules & Wire Miles
Determine required energizer output joules and voltage ratings based on perimeter length, wire strands, and vegetation weed load.
Firebrick Calculator - Wood Stove & Fireplace Mortar
Determine full and split refractory firebrick counts and high-temperature premixed mortar for fireplaces, wood stoves, and pizza ovens.
Flagstone Calculator - Irregular Stone Tons & Square Ft
Determine exact flagstone tonnage, pallet counts, and joint mortar coverage for natural stone patios and garden walkways.
Free Aquaponics Sizing Calculator
Balance your ecosystem using the science-backed UVI feed rate ratio: calculate daily feed, fish stocking biomass, and plant grow bed surface area.
Free Aquarium Heater & Chiller Sizing Calculator
Calculate precise heater wattage and refrigerant chiller capacity to protect corals and fish from thermal shock.
Free Attic Ridge & Soffit Ventilation Calculator
Calculate building code Net Free Ventilating Area (NFVA), balanced 50/50 soffit intake and ridge exhaust venting.
Free Combustion Air Opening & Louver Sizing Calculator
Size combustion air louvers and ducts per NFPA 54 and IFGC mechanical codes: check room volume and calculate net free square inches.
Free Compost C:N Ratio Calculator
Calculate exact weight ratios of brown (carbon) and green (nitrogen) organic inputs to hit the optimal 25:1 to 30:1 hot composting sweet spot.
Free Concrete Footing & Deck Post Load Calculator
Calculate tributary column loads in pounds, verify soil bearing capacity, and size round sonotubes or square footing pads with zero guesswork.
Free Concrete Slab Expansion Joint Spacing Calculator
Calculate ACI-compliant control joint spacing intervals, saw-cut depth (1/4 thickness), and panel layout to stop random surface cracking.
Free Concrete Slab Reinforcing Mesh & Rebar Calculator
Calculate rebar grid linear feet, standard 20ft stick counts, welded wire mesh coverage, rebar chairs, and total steel weight for concrete slabs.
Free Crawl Space Dehumidifier Sizing Calculator
Calculate moisture removal capacity (Pints Per Day - PPD) at AHAM and real-world 65°F crawl space temperatures, airflow CFM, and daily water extraction.
Free Drip Irrigation Emitter Flow & Run Time Calculator
Calculate total zone water flow, mainline poly tubing capacity limits, and optimal timer run times for garden and orchard drip irrigation.
Free French Cleat Shelf Load Capacity Calculator
Calculate maximum safe hanging weight, screw pullout resistance, wood shear limits, and cantilever leverage on French cleat walls.
Free French Drain Perforated Pipe Capacity Calculator
Calculate gravity flow discharge (GPM) using Manning’s equation, trench gravel backfill volume, and self-cleaning water velocity for 4" and 6" drainage pipes.
Free Greenhouse Heater BTU & Glazing Loss Calculator
Calculate winter heating BTU requirements, structural glazing thermal loss, and heater sizing to safeguard plants from frost.
Free Indoor Seed Starting Schedule Calculator
Calculate exact seed sow dates, potting up, hardening-off periods, and garden transplant dates based on your last spring frost date.
Free Lawn Topdressing & Overseeding Calculator
Calculate cubic yards of compost or topsoil blend, grass seed pounds by species, and starter fertilizer for fall lawn renovations.
Free P-Trap to Vent Distance & Slope Calculator
Determine maximum allowable trap arm length, total slope drop, and prevent self-siphonage sewer gas leaks per IPC and UPC plumbing codes.
Free Radon Mitigation Fan & Pipe Size Calculator
Calculate sub-slab depressurization CFM demand, static suction pressure (inches WC), 3" vs 4" PVC pipe velocity, and annual operating electricity costs.
Free Retaining Wall Block & Gravel Backfill Calculator
Calculate total block count, drainage gravel backfill volume, leveling base stone, and geogrid requirements.
Free Retaining Wall Calculator
Calculate exact modular concrete block counts, drainage backfill gravel volume, perforated drain pipe, and geogrid structural reinforcement.
Free Room Exhaust Fan CFM Calculator
Calculate required ventilation airflow (CFM and m³/h) based on room dimensions, target air changes per hour (ACH), and ductwork static pressure losses.
Free Soil Amendment & Fertilizer NPK Calculator
Calculate exact pounds or kilograms of fertilizer required to hit recommended soil test Nitrogen (N), Phosphorus (P), and Potassium (K) targets.
Free Solar Water Heater Sizing Calculator
Calculate domestic hot water energy demand in BTU and kWh, size solar thermal collector area, and calculate optimal storage tank capacity.
Free Submersible Well Pump TDH Calculator
Calculate Total Dynamic Head (TDH), pipe friction losses, pressure tank requirements, and pump horsepower.
Free Sump Pump Flow (GPM) & Basin Sizing Calculator
Calculate storm water inflow rates, required pump discharge (GPM at static head), basin storage, and pump cycle times.
Free Swimming Pool Pump Turnover & Flow Rate Calculator
Calculate pool gallon capacity, turnover flow rate (GPM), pipe velocity limits, and variable-speed pump energy savings.
Free Tankless Water Heater Sizing Calculator
Calculate required temperature rise (ΔT), peak simultaneous GPM demand, and required Gas BTU/hr or Electric kW to avoid cold water sandwich shock.
Free Water Pipe Friction Loss Calculator
Calculate dynamic fluid friction pressure drop in PSI and feet of head loss using the Hazen-Williams equation for PVC, PEX, and Copper.
Free Water Well Pressure Tank Drawdown Calculator
Calculate usable water drawdown (gallons), total tank size, and factory air pre-charge PSI to prevent submersible well pump motor short-cycling.
French Drain Slope Calculator - Trench Depth & Gravel
Calculate exact gravity pitch drops, starting and ending trench depths, and aggregate washed gravel tonnage for yard drainage systems.
French Drain Slope, Trench Gravel & Pipe Sizing Calculator
Calculate minimum trench slope elevation drop, washed drainage gravel tons & cubic yards, pipe sizing, and geotextile fabric wrap.
Galvanic Anode Life Calculator - Sacrificial Zinc Mag Mass
Calculate sacrificial galvanic anode consumption rate, required total alloy mass, service life (years), and anode quantity for Magnesium, Zinc, and Aluminum per NACE and DNV standards.
Glass Thermal Stress Breakage Calculator - Solar Fracture
Assess spontaneous thermal fracture risk from solar radiation absorption, indoor window blinds, deep exterior overhang shadows, and glass edge treatments.