Pipe Size, Flow & Volume
Tools for pipe sizing, pipe diameter, pipe volume, pipe velocity, pipe flow, and flow rate estimates.
About these plumbing calculators
These plumbing calculators are designed for fast estimating, planning, and educational use. They can help with common plumbing calculations such as pipe sizing, water flow, pressure loss, fixture units, drain slope, septic sizing, pump sizing, water heater demand, trench volume, and pipe material costs.
Important plumbing safety note
Plumbing work can involve pressure ratings, local codes, fixture requirements, drainage rules, venting requirements, water heater safety, backflow prevention, septic regulations, and permit rules. Use these calculators as planning estimates and verify important plumbing decisions with a qualified plumber or local building professional before installing or modifying plumbing systems.