US Units Multiplied By Equals Metric Units Metric Units Equals US Units Length Inches 2.5400 Centimeters 0.3937 Feet 0.3048 Meters 3.2808 Yards 0.9144 1.0936 Miles 1.6093 Kilometers 0.6214 Area Square inches 6.4516 Square centimeters 0.1550 Square feet 0.0929 Square meters 10.7640 Square yards 0.8361 1.1960 Acres 0.4047 Hectares 2.4710 Volume Cubic feet 0.0283 Cubic meters 35.3144 Cubic yards 0.7646 1.3079 Gallons 3.7854 Liters 0.2642 Weight Foot-pounds 1.3830 Newton-meters 0.7380 Pounds 0.4536 Kilograms 2.2046

Length The standard unit of length in the metric system is the meter. Other units of length and their equivalents in meters are as follows: 1 millimeter = 0.001 meter 1 centimeter = 0.01 meter 1 decimeter = 0.1 meter 1 kilometer = 1000 meters We symbolize these lengths as follows: 1 millimeter = 1 mm 1 centimeter = 1 cm 1 meter = 1 m 1 decimeter = 1 dm 1 kilometer = 1 km For reference, 1 meter is a little longer than 1 yard or 3 feet. It is about half the height of a very tall adult. A centimeter is nearly the diameter of a dime, a little less than half an inch. A millimeter is about the thickness of a dime.

Mass standard unit in the metric system is the gram. Other units of mass and their equivalents in grams are as follows: 1 milligram = 0.001 gram 1 centigram = 0.01 gram 1 decigram = 0.1 gram 1 kilogram = 1000 grams We symbolize these masses as follows: 1 milligram = 1 mg 1 centigram = 1 cg 1 decigram = 1 dg 1 gram = 1 g 1 kilogram = 1 kg For reference, 1 gram is about the mass of a paper clip. One kilogram is about the mass of a liter of water.

Volume The standard unit of volume in the metric system is the liter. One liter is equal to 1000 cubic centimeters in volume. Other units of volume and their equivalents in liters are as follows: 1 milliliter = 0.001 liter 1 centiliter = 0.01 liter 1 deciliter = 0.1 liter 1 kiloliter = 1000 liters From these units, we see that 1000 milliliters equal 1 liter; so 1 milliliter equals 1 cubic centimeter in volume. We symbolize these volumes as follows: 1 milliliter = 1 ml 1 centiliter = 1 cl 1 deciliter = 1 dl 1 liter = 1 l 1 kiloliter = 1 kl For reference, 1 l is a little more than 1 quart. One teaspoon is about 5 milliliters.

Temperature is expressed in degrees Celsius in the metric system Temperature is expressed in degrees Celsius in the metric system. The boiling point of water (at sea level) is 100°Celsius, or 100°C. The freezing point of water (at sea level) is 0° Celsius. A hot day is about 30° Celsius.

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