Glossary of Terms
Conversion Factors
| Multiply | By | To Obtain |
| Acres | 43,560 | Square feet |
| Barrels (U.S. liquid) | 31.5 | Gallons |
| Barrels (Oil) | 42 | Gallons (Oil) |
| Btu's | 778.16 | Foot-pounds |
| Btu's/min | 2.356 x 10 -2 � | Horsepower |
| Btu's/min | 1.757 x 10 -2 � | Kilowatts |
| Centimeters | 0.3937 | Inches |
| Cubic feet | 7.48052 | Gallons (U.S. liquid) |
| Cubic feet | 28.32 | Liters |
| Cubic feet | 1,728 | Cubic inches |
| Cubic meters | 35.31 | Cubic feet |
| Cubic yards | 27 | Cubic feet |
| Feet | 0.3048 | Meters |
| Feet of water | 62.43 | Pounds/square foot |
| Gallons | 1.3368 x 10 -1 � | Cubic feet |
| Gallons | 3.785 | Liters |
| Gallons of water | 8.3457 | Pounds of water |
| Grams | 2.205 x 10 -3 � | Pounds |
| Inches | 2.54 | Centimeters |
| Kilogram-calories | 3.968 | Btu's |
| Kilowatts | 56.92 | Btu's/min |
| Kilowatt-hours | 3,413 | Btu's |
| Liters | 1.057 | Quarts |
| Meters | 3.281 | Feet |
| Miles | 5,280 | Feet |
| Miles | 1.609 | Kilometers |
| Million gallons/day | 1.54723 | Cubic feet/second |
| Ounces | 28.349 | Grams |
| Ounces (fluid) | 1.805 | Cubic inches |
| Pounds | 0.4536 | Kilograms |
| Pounds/cubic foot | 16.02 | Kilograms/cubic meter |
| Pounds/square foot | 1.414 x 10 -2 � | Inches of mercury |
| Tons (long) | 1.016 | Metric tons |
| Tons (long) | 2,240 | Pounds |
| Tons (long) | 1.12 | Tons (short) |
| Tons (short) | 0.9078 | Metric tons |
| Tons (short) | 2,000 | Pounds |
| Tons (short) | 8.9287 x 10 -1 � | Tons (long) |
| Watts | 3.4129 | Btu's/hour |
| Watt-hours | 3.413 | Btu's |
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