Piping calculators
Fast calculators that run in your browser — no sign-up, works on your phone at site.
Steel weight calculator
Pipe, plate, round and flat bar weight for 16 materials.
Open →Pipe wall thickness calculator
ASME B31.3 required thickness and the schedule that meets it.
Open →Pipe flow velocity calculator
Velocity for any flow rate, with a pipe-size selection table.
Open →Engineering unit converter
Pressure, length, mass, temperature, flow and stress units.
Open →NPS to DN converter
Nominal pipe size in inches to DN and OD in mm.
Open →Pipe pressure drop calculator
Darcy–Weisbach friction loss with Reynolds number and fittings K.
Open →Hydrotest & burst pressure calculator
B31.3 hydrotest pressure and Barlow burst / yield pressure.
Open →Pipe painting area & volume calculator
Outer surface for painting/insulation and hydrotest water volume.
Open →Pipe thermal expansion calculator
Expansion of pipe runs for 15 materials.
Open →Pipe cost calculator
Weight × rate per kg with GST, for any size and material.
Open →Flange bolt & gasket BOQ calculator
Studs, nuts and gaskets for a list of flanged joints.
Open →Last updated 2026-11-02