Basic Units of Measurement and Conversions - Basic Mathematics for Water and Wastewater Operators - page 58

TABLE 2.7
Conversion Factors by Unit Category

Factor Metric (SI) or English Conversions

Units of Length

1 cm (centimeter) 0.0328 ft (foot)

0.394 in. (inch)
10,000 µm (microns, micrometers)
100,000,000 Å = 10 8 Å (Ångstroms)

1 ft (foot) 30.48 cm (centimeters)

12 in. (inches)
0.3048 m (meter)
1.65 × 10 -4 NM (nautical mile)
1.89 × 10 -4 mi (statute mile)

1 in. (inch) 2.54 cm (centimeter)

1000 mils

1 km (kilometer) 3280.8 ft (feet)

0.54 NM (nautical mile)
0.6214 mi (statute mile)

1 m (meter) 1 × 10 10 Å (Ångstroms)

100 cm (centimeters)
3.28 ft (feet)
39.37 in. (inches)
1 × 10 -3 km (kilometer)
1000 mm (millimeters)
1,000,000 µm = 1 × 10 6 µm (microns, micrometers)
1 × 10 9 nm (nanometers)

1 NM (nautical mile) 6076.1 ft (feet)

1.852 km (kilometers)
1.15 mi (statute miles)
2025.4 yd (yards)

1 mi (statute mile) 5280 ft (feet)

1.609 km (kilometers)
1690.3 m (meters)
0.869 NM (nautical mile)
1760 yd (yards)

Units of Area

1 cm 2 (square centimeter) 1.076 × 10 -3 ft 2 (square feet)

0.155 in. 2 (square inch)
1 × 10 -4 m 2 (square meter)

1 ft 2 (square foot)

2.296 × 10 -5 ac (acre)
929.03 cm 2 (square centimeters)
144 in. 2 (square inches)
0.0929 m 2 (square meter)

1 m 2 (square meter) 10.76 ft 2 (square feet)

1550 in. 2 (square inches)