# How do you convert "4.5 gal" to "L"? How about to "mL" ?

Jul 7, 2015

You need to use two simple conversion factors for this one.

#### Explanation:

In order to go from gallons to liters you need to use a conversion factor. More precisely, you need to use the fact that 1 gallon is the equivalent of 3.78541178 L.

This means that 4.5 gallons will be equal to

$4.5 \cancel{\text{gallons") * "3.78541178 L"/(1cancel("gallon")) = color(green)("17 L}}$

The answer is rounded to two sig figs, the number of sig figs you have for 4.5 gallons.

To go from liters to mililiters, use the fact that 1 liter contains 1000 mililiters.

$17 \cancel{\text{L") * "1000 mL"/(1cancel("L")) = color(green)("17,000 mL}}$