## L

1,000 mL

One can covert between units in the SI system by using the equivalents in Table 3 to make conversion factors.

Example 1 Step 1

Write conversion factors for the units given. From Table 3, you know that 100 cm = 1 m. The conversion factors are

100 cm and

Step 2

### 1 m 100 cm

Decide which conversion factor to use.Select the factor that has the units you are converting from (m) in the denominator and the units you are converting to (cm) in the numerator.

100 cm

Step 3

Multiply the starting quantity and units by the conversion factor.Cancel the starting units with the units in the denominator. There are 400 cm in 4 m.

100 cm IjflT

Practice Problem How many milligrams are in one kilogram? (Hint:You will need to use two conversion factors from Table 3.)

 Type of Measurement Equivalent Length 1 in = 2.54 cm 1 yd = 0.91 m 1 mi = 1.61 km Mass and Weight* 1 ton (short) = 0.91 tonnes (metric tons) 1 lb = 4.45 N Volume 1 in3 = 16.39 cm3 1 qt = 0.95 L 1 gal = 3.78 L Area 1 in2 = 6.45 cm2 1 yd2 = 0.83 m2 1 mi2 = 2.59 km2 1 acre = 0.40 hectares K = °C + 273

*Weight is measured in standard Earth gravity.

*Weight is measured in standard Earth gravity.

Convert Between Unit Systems Table 4

gives a list of equivalents that can be used to convert between English and SI units.

Example If a meterstick has a length of 100 cm, how long is the meterstick in inches?

Step 1

Write the conversion factors for the units given. From Table 4,1 in = 2.54 cm.