Information for converting from the metric system to the U.S. Customary
System units of area is given below. Equivalents are approximate.
1 square centimeter = 0.155 square inches
(1/8 x 1/8 = 1/64
640 x 1/64 = 10)
1 square meter = 10.8 square feet = 1.2 square yards
(259/64 = 4.04688
1 are = 0.025 acres = 120 square yards
10/2.48 = 4.03226)
1 hectare = 2.48 acres
1 square kilometers = 0.386 square miles
A piece of land one kilometer by one kilometer contains about
TEMPERATURE. Americans are familiar with the Fahrenheit scale
developed by Gabriel Fahrenheit in the 18th century. In the Fahrenheit
scale, water freezes at 32 degrees Fahrenheit ( F) and boils at 212 F.
(640 x 0.386 = 247.04)
Shortly after Fahrenheit's scale was adopted, Anders Celsius, a Swede,
developed a scale in which the freezing point of water is zero (0 C) and
the boiling point of water is 100 (100 C). The Celsius scale was
adopted by the metric system because of the convenience of the scale.
Sometimes the Celsius scale is called the "centigrade" scale because
one degree is one-hundredth (centi-) of the measurement between
freezing and boiling.
Two primary points to remember when working with the Celsius scale
Water freezes at
C and boils at