Gas Pipe Sizing Calculator

Size gas piping for natural gas and propane per fuel gas code requirements.

Load Information

Quick Load Calculator

Natural Gas Capacity (CFH)

0.5" WC pressure drop, schedule 40 iron pipe

Pipe Size10 ft30 ft50 ft100 ft
1/2"1751007855
3/4"360210160115
1"680390305215
1-1/4"1,400810630440
1-1/2"2,1001,200940660
2"3,9502,2801,7801,250

Typical Appliance Loads

ApplianceBTU/hr Input
Gas Furnace60,000-120,000
Tank Water Heater30,000-50,000
Tankless Water Heater150,000-200,000
Gas Range40,000-75,000
Gas Dryer20,000-25,000
Fireplace (vented)25,000-40,000
Pool Heater150,000-400,000