NASA Procedures and Guidelines
This Document is Obsolete and Is No Longer Used. Check the NODIS Library to access the current version: http://nodis3.gsfc.nasa.gov
NPR 8580.1 Eff. Date: November 26, 2001 Cancellation Date:	Implementing The National Environmental Policy Act And Executive Order 12114
| TOC | Preface | Chp1 | Chp2 | Chp3 | Chp4 | Chp5 | Chp6 | Chp7 | Chp8 | Chp9 | Chp10 | Chp11 | Chp12 | Chp13 | AppdxA | AppdxB | AppdxC | AppdxD | AppdxE | AppdxF | AppdxG | AppdxH | AppdxI | AppdxJ | AppdxK | AppdxL | ALL |

APPENDIX A. Common Metric/British System Equivalents

Linear
1 centimeter (cm) = 0.3937 inch	1 inch = 2.54 cm
1 centimeter = 0.0328 foot (ft)	1 foot = 30.48 cm
1 meter (m) = 3.2808 feet	1 ft = 0.3048 m
1 meter = 0.0006 mile (mi)	1 mi = 1609.3440 m
1 kilometer (km) = 0.6214 mile	1 mi = 1.6093 km
1 kilometer = 0.53996 nautical mile (nmi)	1 nmi = 1.8520 km
	1 mi = 0.87 nmi
	1 nmi = 1.15 mi
Area
1 square centimeter (cm2) = 0.1550 square inch (in2)	1 in2 = 6.4516 cm2
1 square meter (m2) = 10.7639 square feet (ft2)	1 ft2 = 0.09290 m2
1 square kilometer (km2) = 0.3861 square mile (mi2)	1 mi2 = 2.5900 km2
1 hectare (ha) = 2.4710 acres (ac)	1 ac = 0.4047 ha
1 hectare (ha) = 10,000 square meters (m2)	1 ft2 = 0.000022957 ac
Volume
1 cubic centimeter (cm3) = 0.0610 cubic inch (in3)	1 in3 = 16.3871 cm3
1 cubic meter (m3) = 35.3147 cubic feet (ft3)	1 ft3 = 0.0283 m3
1 cubic meter (m3) = 1.308 cubic yards (yd3)	1 yd3 = 0.76455 m3
1 liter (l) = 1.0567 quarts (qt)	1 qt = 0.9463264 l
1 liter = 0.2642 gallon (gal)	1 gal = 3.7845 l
1 kiloliter (kl) = 264.2 gal	1 gal = 0.0038 kl
Weight
1 gram (g) = 0.0353 ounce (oz)	1 oz = 28.3495 g
1 kilogram (kg) = 2.2046 pounds (lb)	1 lb = 0.4536 kg
1 metric ton (mt) = 1.1023 tons	1 ton = 0.9072 metric ton
Energy
1 joule = 0.0009 British thermal unit (BTU)	1 BTU = 1054.18 joule
1 joule = 0.2392 gram-calorie (g-cal)	1 g-cal = 4.1819 joule
Pressure
1 newton/square meter (N/m2) = 0.0208 pound/square foot (psf)	1 psf = 48 N/m2
Force
1 newton (N) = 0.2248 pound-force (lbf)	1 lbf = 4.4478N
Radiation
1 becquerel (Bq) = 2.703 x 10-11 curies (Ci)	1 Ci = 3.70 x 1010 Bq
1 sievert (Sv) = 100 rem	1 rem = 0.01 Sv

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