Gas Pipe Sizing Calculator
Gas Pipe Size from Load
Calculate gas pipe diameter from total BTU demand
Formula
CFH = Total BTU / BTU per cubic foot | Pipe size from capacity tables based on length and pressure
Frequently Asked Questions
How do I calculate gas pipe size?
Add up the BTU ratings of all gas appliances on the line, convert to cubic feet per hour, then use sizing tables based on pipe length and pressure. Always follow local codes.
What pressure is residential gas?
Residential natural gas is typically delivered at less than 0.5 PSI (about 7 inches water column) after the regulator. Some appliances use 2 PSI lines.
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