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APPENDIX N CONVERSIONS AND UNITS Distance-related conversions kilometers (km) and miles (mi) 1 km = 0.62 mi 1 mi = 1.6 km km2 (square kilometers) and mi2 (square miles) 1 km2 = 0.39 mi2 1 mi2 = 2.59 km2 m (meters) and ft (feet) 1 m = 3.28 ft 1 ft = 0.30 m m3 (cubic meters) and ft3 (cubic feet) 1 m3 = 35.32 ft3 1 ft3 = 0.03 m3 km/hr (kilometers per hour) and mph (miles per hour) 1 km/hr = 0.62 mph 1 mph = 1.6 km/hr Radiation-related conversions mSv (millisieverts), mrem (millirem), and mGya (milligray) 1 mSv = 100 mrem = 1 mGy 1 mrem = 0.01 mSv = 0.01 mGy Bq (becquerels) and Ci (curies) 1 Bq = 2.7 x 10-11 Ci 1 Ci = 3.7 x 1010 Bq Other MJ (megajoules) and kWhr (kilowatt hours) 1 MJ = 0.28 kWhr 1 kWhr = 3.6 MJ MPa (megapascals) and psi (pounds per square inch) 1 MPa = 145 psi 1 psi = 0.007 MPa Celsius and Fahrenheit C = (5/9)*(F - 32) F = (9/5)*C +32 metric tons and pounds (lbs) 1 metric ton = 2204.6 lbs prefixes pico- 10-12 micro- 10-06 milli- 10-03 kilo- 103 mega- 106 giga- 109 tera- 1012 peta- 1015 a Millisieverts and millirem are units of effective dose, whereas gray is a unit of absorbed dose. They are numerically equivalent when exposure is from gamma rays and x-rays. Prepublication Copy N-1
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Appendix N: Conversions and Units Unit of Measure Abbreviation Type of Measure Becquerel Bq radiation activity Celsius C temperature centimeters cm distance Fahrenheit F temperature feet ft distance gallon gal volume gallons per minute gpm flow rate Gray Gy absorbed radiation dose Joule J energy kilogram kg mass kilometers km distance kilopascals kPa pressure kilovolts kV electrical potential kilowatt kW electrical power kilowatt-hour kWhr energy liters per minute lpm flow rate megapascals MPa pressure megawatts electric MWe electrical power meters m distance millimeters mm distance millirem mrem effective radiation dose millisievert mSv effective radiation dose newton N force pound lbs mass pounds per square inch psi pressure volts V electrical potential Prepublication Copy N-2