Open Resources for Community College Algebra

Appendix A 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)

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)

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)

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)

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)

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)