Following are seven base units used in the metric system:
Table 1: Base Units
|Amount of substance||mole||mol|
Conversion factors for the metric system can be determined from prefixes added to -meter. Some of the common prefixes are given below.
Convert 12.52 L to mL
To go from L to mL, you have to move three times to the left. Therefore, move the decimal three times to the right.
Moving the decimal three places to the right gives:
SInce you moved three spaces to the left to get to ml on the diagram divide the value by ten to the power of minus three (10-3).
Have questions about how the ten to the power of three became positive? Check out this guide for more details.
Converting Units Using Conversion Factor
|Units of length in the metric system||Units of weight in the metric system||Units of volume in the metric system|
1,000 millimeters (mm) = 1 meter
100 centimeters (cm) = 1 meter
10 decimeters (dm) = 1 meter
1 dekameter (dam) = 10 meters
1 hectometer (hm) = 100 meters
1 kilometer (km) = 1000 meters
1 gram = 1,000 milligrams (mg)
1 gram = 100 centigrams (cg)
1 kilogram (kg) = 1,000 grams
1 metric ton (t) = 1,000 kilograms
1 cc = 1 cm3
1 milliliter (mL) = 1 cm3
1 liter (L) = 1,000 millimeters (mL)
1 hectoliter (hL) = 100 liters (L)
1 kiloliter (kL) = 1,000 liters (L)
Convert 42.50 m to km
Step 1 : Write the conversion factor from the table above.
1 kilometer (km) = 1000 meters (m)
Step 2 : Write the conversion factor as a ratio.
Since we are converting meters to kilometers, write the km on the top and m on the bottom, as shown below:
Step 3: Multiply 42.50m by the above ratio.
Then the answer becomes 0.04250 km with four significant digits.
** Notice how the "m" on the top and the "m" at the bottom cancel out to give "km" as the final unit, as seen below:
A unit conversion calculator can be used to verify your answers.
Study tips for unit conversion
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