About PlumbingSoftwares.com

PlumbingSoftwares.com provides free online calculators for plumbing design, pipe sizing, drainage, water heating, pumps, gas piping, stormwater, and job estimating.

Each calculator includes formulas, examples, limitations, and code context. Results are preliminary guidance — local code and professional judgment govern final decisions.

Contractor tools support estimating, quoting, invoicing, and work orders. The Work Orders app is a separate linked application.