Plumbing & HVAC Calculators
Calculate plumbing and HVAC requirements
Pipe Volume Calculator
Calculate water volume and weight in pipes
Water Flow Rate
Calculate GPM based on pipe diameter and velocity
Pipe Expansion Calculator
Calculate thermal expansion for PVC, Copper, and PEX
Sump Pump Sizing
Estimate required pump HP based on vertical lift
Water Heater Size
Calculate recommended tank size or tankless GPM
BTU Calculator
Estimate heating and cooling load for rooms
Air Flow (CFM)
Calculate required CFM based on room volume and ACH
Duct Sizing Calculator
Estimate round duct diameter for desired airflow
AC Tonnage Calculator
Estimate AC unit size (tons) based on square footage and zone
Air Change Rate
Calculate Air Changes per Hour (ACH) from fan rating
Pipe Friction Loss
Calculate pressure drop and head loss in pipes
Septic Tank Sizing
Estimate septic tank size based on bedrooms and occupancy
Rainwater Harvesting
Calculate potential rainwater collection from roof area
Irrigation Water Calculator
Estimate water usage for lawns and gardens
Gas Pipe Sizing
Estimate natural gas pipe size based on BTU load
Heat Pump Sizing
Estimate heat pump size for heating and cooling
Ventilation Louver Size
Calculate Net Free Area (NFA) for attic ventilation