Plumbing Calculators & Tools | Calciverse

Any two of run, drop, and slope → compute the third for basic drain layout

Total fixture units and slope → rule-of-thumb horizontal branch and building drain sizes

Fixture units, slope, and trap arms → suggested branch/stack sizes and code-style checks (conceptual)

Up to four fixture types → total fixture units and suggested building drain size (rule-of-thumb)

Flow and velocity limit → approximate nominal gas pipe size (velocity-based)

Convert between gallons per minute, liters per minute, and cubic meters per hour

Fixture units, material, and run → design flow, velocity check, and smallest pipe that meets limits (conceptual)

Materials, labor, overhead, margin, and emergency markup → recommended quote and profit

Convert between psi, bar, kPa, and meters of water column

Up to three pipe segments + elevation → friction loss, static loss, and booster pump suggestion

Water line diameter, length, and flow → velocity and friction loss (Hazen–Williams)

Required vs. pump BEP flow/head → simple match index (for quick screening only)

Simultaneous fixtures, inlet temperature, and climate → required GPM and BTU/hr

Rectangular or cylindrical tank dimensions and fill height → volume in ft³, gallons, and liters

Flow, length, and limits → recommended nominal size (using Hazen–Williams approximation)