Copper Pipe Sizing Calculator

Size copper water supply pipes based on flow rate and velocity limits per UPC/IPC.

Required flow rate.
GPM
Maximum allowable velocity (typically 8 ft/s for water).
ft/s

Results

Minimum Diameter-inches
Recommended Size-Type L
Actual Velocity-ft/s
References: Based on copper tube Type L dimensions per ASTM B88 and velocity limits per UPC