Appendix C
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 × 10−11 Ci | 1 Ci = 3.7 × 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- | 10-6 | |
milli- | 10-3 | |
kilo- | 103 | |
mega- | 106 | |
giga- | 109 | |
tera- | 1012 | |
peta- | 1015 | |
a Millisieverts and millirem are units of effective dose, whereas milligray is a unit of absorbed dose. They are numerically equivalent when exposure is from gamma rays and x-rays.
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 | lb | mass |
pounds per square inch | psi | pressure |
volts | V | electrical potential |