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Old 02-18-2012, 11:39 AM   #1
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math to convert BTU's used to gallons of lpg

Just curious if there is a conversion to use
If the stove. Had a 10k btu burner and two 5k burners and I used the 10k on high for 30min and a 5k on high for 30 min and the other 5k on low for say 30 mins.
That would be pasta,eggs and sauce for example
How much propane would I burn
Just looking for round a bout measurment

Edited for real stupid spelling
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Old 02-18-2012, 11:58 AM   #2
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Re: math to convert BTU's used to gallons of lpg

Propane is usually measured in pounds. You get 21622 btu per pound.
So a 20 pound bottle will net you 432440 btu. So just find out what the
usage of your product is and the amount of your supply.
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Old 02-18-2012, 04:44 PM   #3
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Re: math to convert BTU's used to gallons of lpg

1 gallon propane is actually rated as 27kWh of electricity. But because RV appliance BTU's are expressed through BTU input ratings and are based on a "per hour" basis.RV appliances (both LP and AC) are so inefficient, using 22 rather than 27 takes the inefficiency into account. So...
1 gallon LP = 27 kWh (Kilowatt Hours) of electricity = approximately 91,500 BTU.
We buy our LP by the metered gallon. Sometimes is is weighted as it is filled (meter runs), but we pay for the fuel by the gallon.


If you are using RV appliances then...
1 gallon LP = 22 kWh (Kilowatt Hours) of electricity = approximately 91,330 to 91,600 BTU.

The Dept. of Energy says 91,330 BTU per gallon LP. The American Gas Association says 91,600.

Appliance BTU's are expressed through BTU input ratings and are based on a "per hour" basis.

For RV's - LP Vs. AC KWH costs: Divide cost of Propane per gallon by 22 to get equivalent cost of
electric. If propane is cheaper, Then use propane. If electric is cheaper, Then use electric.

If you are using energy efficient household appliances use "27" not "22". We are using household appliances in the bus (GE Profile Gas Range... only LP appliance). We had RV appliances in the Class C (RV water heater, RV furnace & RV gas range).

NOTE: as you can see the figures tend to range as it really depends on your appliances, the quality of your LP and how well your regulator works. All you can do is get a general "ballpark" figure. Using a single 30" home gas range (yes I do run the oven as well as the "high output burner a lot). 20 Lb LP tank filled correctly takes about 1 month to use.

GE Profile 30" Gas Range
Top Burner BTU Rating - LP:
(1) 13,000 BTU's;
(2) 9,100 BTU's;
(1) 5,000 BTU's;
Oven BTU Rating - LP: 15,000 BTU's
Broiler BTU Rating - LP: 12,000 BTU's


Typical (Maytag) RV 22" range (3 burner)
Top Burner BTU Rating - LP:
(1) 9,100 BTU 's;
(2) 6,500 BTU's
Oven BTU' rating: Unknown
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Old 02-18-2012, 05:18 PM   #4
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Re: math to convert BTU's used to gallons of lpg

Greeat info...we do love to cook and will be using a houehold range with the oven

The few we have looked at come with lp conversion kits

Right now only use of lp will be cooking either inside or outside
Stove and oven,bbq grill and smoker

Our time off work right now and next few years shouldn't show the need for a furnace etc yet

So our plan of 2 forklift tanks and 1 bbq size should be good.

Thanks again for info!
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