3861 (.4) square milesġ square mile = 2.590 (2.6) square kilometersġ square mile = 259 (260) hectares Volume (capacity) This unit of land is called the hectare (ha) and is equal to approximately 2.5 acres.ġ square meter (sq m) = 1.196 (1.2) square yardsġ square kilometer (sq km) =. The basic metric unit of land area measurement is a square with each side 100 meters long, covering an area of 10,000 square meters. A centimeter (one-hundredth of a meter) is slightly less than one-half of an inch.
A speed of 100 kilometers per hour is about 60 miles per hour. So a distance of 100 kilometers is about 60 miles. The basic unit of length is the meter-slightly more than one yard in length. Easy-to-remember approximate or ball-park conversions are often used in general discussion. Precise conversions are used for exact technical analysis.
Precise and approximate (in parentheses) metric conversions are in the next column. Conversions between these measurements are simple decimal locations based on factors of 10. Thus, all dimensions of length can be expressed as variations of a meter. For example, a long distance is expressed in kilometers (1,000 meters) or a short length may be expressed in millimeters (1/1,000 of a meter). Metric units can be modified by adding a prefix to simplify expressions of very short or long units. So we often need to make conversions between our system and the metric system. The United States is the only major trading nation that does not use the metric system. Most of the world does its measuring in meters, grams, and liters.
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