ORCCA Unit Conversions

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Appendix B Unit Conversions

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) $\approx 3.281$ feet (ft)
$1$ yard (yd) $= 36$ inches (in)	$1$ meter (m) $= 10$ decimeters (dm)	$1$ meter (m) $\approx 1.094$ yard (yd)
$1$ mile (mi) $= 5280$ feet (ft)	$1$ dekameter (dam) $= 10$ meters (m)	$1$ mile (mi) $\approx 1.609$ kilometer (km)
	$1$ hectometer (hm) $= 100$ meters (m)
	$1$ kilometer (km) $= 1000$ meters (m)

Table B.0.1. Length 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 (ft²)	$1$ hectare (ha) $= 10000$ square meters (m²)	$1$ hectare (ha) $\approx 2.471$ acres
$640$ acres $= 1$ square mile (mi²)	$100$ hectares (ha) $= 1$ square kilometer (km²)

Table B.0.2. Area 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 (cm³)	$1$ cubic inch (in³) $\approx 16.39$ milliliters (mL)
$1$ fluid ounce (fl oz) $= 2$ tablespoons (tbsp)	$1$ milliliter (mL) $= 1$ cubic centimeter (cm³)	$1$ fluid ounce (fl oz) $\approx 29.57$ milliliters (mL)
$1$ cup (c) $= 8$ fluid ounces (fl oz)	$1$ liter (L) $= 1000$ milliliters (mL)	$1$ liter (L) $\approx 1.057$ quarts (qt)
$1$ pint (pt) $= 2$ cups (c)	$1$ liter (L) $= 1000$ cubic centimeters (cm³)	$1$ gallon (gal) $\approx 3.785$ liters (L)
$1$ quart (qt) $= 2$ pints (pt)
$1$ gallon (gal) $= 4$ quarts (qt)
$1$ gallon (gal) $= 231$ cubic inches (in³)

Table B.0.3. Volume 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) $\approx 28.35$ grams (g)
$1$ ton (T) $= 2000$ pounds (lb)	$1$ kilogram (kg) $= 1000$ grams (g)	$1$ kilogram (kg) $\approx 2.205$ pounds (lb)
	$1$ metric ton (t) $= 1000$ kilograms (kg)

Table B.0.4. Weight/Mass 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) $\approx 12$ months (mo)	$1$ second (s) $= 1000$ milliseconds (ms)
$1$ day (d) $= 24$ hours (h)	$1$ year (yr) $\approx 52$ weeks (wk)	$1$ second (s) $= 10^{6}$ microseconds (µs)
$1$ hour (h) $= 60$ minutes (min)	$1$ year (yr) $\approx 365$ days (d)	$1$ second (s) $= 10^{9}$ nanoseconds (ns)
$1$ minute (min) $= 60$ seconds (s)	$1$ month (mo) $\approx 30$ days (d)

Table B.0.5. Time Unit 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)	$1$ terabit (Tb) $= 1024$ gigabits (Gb)

Table B.0.6. Computer Storage/Memory Conversion Factors