Section Two
The focus of section two will be on converting U.S. Standard measurements to metric units.
Section two will also review specific aspects of the metric system for Water-Based System Inspectors.
The following units will be covered in section two: liter, cubic decimeter, Pascal, meter, millimeter, bar and others.
Page 10 – Conversion
To convert U.S. Standard units to metric units, you will need a formula for each conversion.
For example:
We will assume that both amounts are U.S. dollars.
Your friend in England buys 6 liters of gas for $12.00. You pay $6.00 for 2 gallons. Who is buying the cheaper gas?
To figure this out we need to know how many liters are equal to a gallon. You look the answer up in the encyclopedia or an almanac. Your formula is: 1 gallon=3.785 liters.
Now let’s apply what you know:
First find out how many dollars you are paying per unit:
$2.00 per liter; $3.00 per gallon;
A gallon equals 3.785 liters. Now multiply the 2 numbers to turn it into liters.
1 x 3.785= 3.785 liters.
Now take this number and divide it by how many dollars you are paying.
$3/3.785= $0.79
Compare your $0.79 per liter to your friends $2 per liter.
Solution:
Your gas is cheaper.
Liters
A liter is another name for a cubic decimeter (1L = 1dm3). In other words a liter is 0.001m3.
The formula for converting liters to gallons is:
Liters x 0.26417
For example:
You have 12 liters of tea and a 3-gallon container to fill. You want to fill the container completely. Do you have enough tea to fill the container?
Use the above formula:
12 liters x 0.26417
= 3.17004 gallons
Conclusion: You have more tea than the container will hold.
How many liters of tea would you need to fill 3 gallons exactly?
Use the formula from the previous page:
3 gallons x 3.785
= 11.355 liters required to fill the container