Calculate pipe sizing, water flow rates, fixture costs, and plumbing project estimates — all for free. No signup, no guesswork.
Pipe diameter, flow rate, pressure drop, and sizing calculators.
Fixture unit, drain slope, vent sizing, and drainage calculators.
Water heater sizing, well pump, pressure tank, and supply calculators.
Project cost, pipe material, labor, and plumbing renovation calculators.
Calculate required pipe diameter from flow rate and velocity for any pipe material.
Calculate water flow rate from pipe diameter and pressure using standard flow equations.
Calculate pressure loss in pipes using the Hazen-Williams equation for plumbing systems.
Calculate total fixture units (WSFU/DFU) for bathrooms, kitchens, and commercial spaces.
Calculate the correct drain slope and total drop for horizontal drain pipes per plumbing code.
Size vent pipes based on fixture units and developed length per plumbing code tables.
Calculate required septic tank size based on number of bedrooms and daily water usage.
Calculate the right water heater tank size based on household size and hot water usage patterns.
Calculate BTU requirements and flow rate for a tankless (on-demand) water heater based on simultaneous fixture usage.
Calculate well pump horsepower from well depth, water level, discharge pressure, and desired flow rate.
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