The energy in one gallon of gasoline equals:
- 124,000 Btu
- 36.3 kilowatt-hours (See the Soltrex Interactive Energy Calculator to relate kWh to other outputs.)
- 48.7 horsepower/hour
- 31,250 kilocalories
- 1.24 therms
- 124 cubic feet of natural gas
- 1.36 gallons of propane
- 12.4 lbs. of coal (depending on quality)
- 0.89 gallon of home heating or diesel oil
- 0.005 standard cord of firewood
Put in a value for any one element, and all the others will fall in line. Don't use commas.
(Thanks to www.unitconversion.org.)
Examples of Moves You Can Make:
1. I just put an insulation blanket around my electric hot-water heater. Estimated electrical savings are 5 percent. At 4700 kWh per year, savings would be about 235 kWh. 235 kWh = 6.47 gallons of gasoline.
2. I'm carpooling to work with my neighbor two days a week. This saves me about three gallons of gas a week (and completely eliminates two person/days of pollution). Three gallons of gas per week - 3.72 therms (1.24 x 3). That would be 182 therms per year (49 weeks x 3.72) or 3 barrels of oil. Wouldn't it be helpful if a few million more people did that every day?
3. I walk to my friend's house now instead of driving. It's about a mile each way. If I do that twice a week for a year, it's 4 miles x 50 weeks = 200 miles / 25 miles per gallon = 8 gallons of gasoline, or 992,000 Btu, or 9.92 therms.
4. In the example above, those walks to the friend's house also burn about 120 kilocalories per round-trip (that's for a 150-lb person; see the Soltrex Interactive Energy Calculator for kilowatt-hours, which you can then convert onward). So 120 kilocalories x 2 trips per week x 50 per year = 12,000 kilocalories. That's less than half a gallon of gasoline -- no wonder we're so addicted to petrofuel. On the other hand, 12,000 calories is about 4 pounds of fat.
5. Here's a combination example. Instead of using a leaf blower to clean up my yard this year, I used a rake. I saved a quart of gas and oil, or 31,000 Btu (124,000 Btu / 4), and I burned about 700 calories in two hours.