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Unit Conversions Reference Sheet
Table B.0.1: Length Unit Conversion Factors
Units of Length in the US/Imperial System
Units of Length in the Metric System
System to System Length Conversions 1 foot (ft) = 12 inches (in)
1 meter (m) = 1000 millimeters (mm)
1 inch (in) = 2.54 centimeters (cm) 1 yard (yd) = 3 feet (ft)
1 meter (m) = 100 centimeters (cm)
1 meter (m) ≈ 3.281 feet (ft) 1 yard (yd) = 36 inches (in)
1 meter (m) = 10 decimeters (dm)
1 meter (m) ≈ 1.094 yard (yd) 1 mile (mi) = 5280 feet (ft)
1 dekameter (dam) = 10 meters (m)
1 mile (mi) ≈ 1.609 kilometer (km) 1 hectometer (hm) = 100 meters (m) 1 kilometer (km) = 1000 meters (m)
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Table B.0.2: Area Unit Conversion Factors
Units of Area in the US/Imperial System
Units of Area in the Metric System
System to System Area Conversions 1 acre = 43560 square feet (ft^2 )
1 hectare (ha) = 10000 square meters (m^2 )
1 hectare (ha) ≈ 2.471 acres 640 acres = 1 square mile (mi^2 )
100 hectares (ha) = 1 square kilometer (km^2 )
Table B.0.3: Volume Unit Conversion Factors
Units of Volume in the US/Imperial System
Units of Volume in the Metric System
System to System Volume Conversions 1 tablespoon (tbsp) = 3 teaspoon (tsp)
1 cubic centimeter (cc) = 1 cubic centimeter (cm^3 )
1 cubic inch (in^3 ) ≈ 16.39 milliliters (mL) 1 fluid ounce (floz) = 2 tablespoons (tbsp)
1 milliliter (mL) = 1 cubic centimeter (cm^3 )
1 fluid ounce (floz) ≈ 29.57 milliliters (mL) 1 cup (c) = 8 fluid ounces (floz)
1 liter (L) = 1000 milliliters (mL)
1 liter (L) ≈ 1.057 quarts (qt) 1 pint (pt) = 2 cups (c)
1 liter (L) = 1000 cubic centimeters (cm^3 )
1 gallon (gal) ≈ 3.785 liters (L) 1 quart (qt) = 2 pints (pt) 1 gallon (gal) = 4 quarts (qt) 1 gallon (gal) = 231 cubic inches (in^3 ) Revised: 2020-05-
Table B.0.4: Weight/Mass Unit Conversion Factors
Units of Mass/Weight in the US/Imperial System
Units of Mass/Weight in the Metric System
System to System Mass/Weight Conversions 1 pound (lb) = 16 ounces (oz)
1 gram (g) = 1000 milligrams (mg)
1 ounce (oz) ≈ 28.35 grams (g) 1 ton (T) = 2000 pounds (lb)
1 kilogram (kg) = 1000 grams (g)
1 kilogram (kg) ≈ 2.205 pounds (lb) 1 metric ton (t) = 1000 kilograms (kg)
Table B.0.5: Time Unit Conversion Factors
Precise Units of Time
Imprecise Units of Time
Units of Time in the Metric System 1 week (wk) = 7 days (d)
1 year (yr) ≈ 12 months (mo)
1 second (s) = 1000 milliseconds (ms) 1 day (d) = 24 hours (h)
1 year (yr) ≈ 52 weeks (wk)
1 second (s) = 106 microseconds (μs) 1 hour (h) = 60 minutes (min)
1 year (yr) ≈ 365 days (d)
1 second (s) = 109 nanoseconds (ns) 1 minute (min) = 60 seconds (s)
1 month (mo) ≈ 30 days (d)
(^12) 3 54 (^76) 8
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Table B.0.6: Computer Storage/Memory Conversion Factors
Bytes and Bits Bytes and Bytes Bits and Bits 1 byte (B) = 8 bits (b)
1 kilobyte (kB) = 1024 bytes (B)
1 kilobit (kb) = 1024 bits (b) 1 kilobyte (kB) = 8 kilobits (kb)
1 megabyte (MB) = 1024 kilobytes (kB)
1 megabit (Mb) = 1024 kilobits (kb) 1 megabyte (MB) = 8 megabits (Mb)
1 gigabyte (GB) = 1024 megabytes (MB)
1 gigabit (Gb) = 1024 megabits (Mb) 1 gigabyte (GB) = 8 gigabits (Gb)
1 terabyte (TB) = 1024 gigabytes (GB)
1 teraabit (Tb) = 1024 gigabits (Gb)
01001111 01010010 01000011 01000011 01000001
Revised: 2020-05-
