Length
- 1 millimeter 1mm2 = 1000 micrometers 1mm2
- 1 centimeter 1cm2 = 10 mm
- 1 meter 1m2 = 100 cm
- 1 m = 39.37 inches 1in2 [U.S. Survey Foot]
- 1 kilometer 1km2 = 1000 m
- 1 km = 0.62137 miles
- 1 in. = 25.4 mm exactly [International Foot]
- 1 ft = 304.8 mm exactly [International Foot]
- 1 mile = 5280 ft
- 1 nautical mile = 6076.10 ft = 1852 m
- 1 rod = 1 pole = 1 perch = 16.5 ft
- 1 Gunter’s chain 1ch2 = 66 ft = 4 rods
- 1 mile = 80 ch
- 1 vara = about 33 inches in Mexico and California and 33@1>3 inches in Texas
Area
- 1 mm2 = 0.00155 in2
- 1 m2 = 10.76 ft2
- 1 km2 = 247.1 acres
- 1 hectare 1ha2 = 2.471 acres
- 1 acre = 43,560 ft2
- 1 acre = 10 ch2, i.e., 10 166 ft * 66 ft2
- 1 acre = 4046.9 m2
- 1 ft2 = 0.09290 m2
- 1 ft2 = 144 in2
- 1 in2 = 6.452 cm2
- 1 mile2 = 640 acres 1normal section2
Angles
- 1 revolution = 360 degrees = 2p radians
- 1° (degree) = 60′ (minutes)
- 1′ = 60″ 1seconds2
- 1° = 0.017453292 radians
- 1 radian = 57.29577951° = 57°17′44.806″
- 1 radian = 206,264.8062″
- 1 revolution = 400 grads 1also called gons2
- tan 1″ = sin 1″ = 0.000004848
- p = 3.141592654
Volume
- 1 m3 = 35.31 ft3
- 1 yd3 = 27 ft3 = 0.7646 m3
- 1 litre = 0.264 gal [U.S.]
- 1 litre = 0.001(3)
- 1 gal [U.S.] = 3.785 litres
- 1 ft3 = 7.481 gal [U.S.]
- 1 gal [Imperial] = 4.546 litres = 1.201 gal [U.S.]
Other Conversions
- 1 gram 1g2 = 0.035 oz
- 1 kilogram 1kg2 = 1000 g = 2.20 lb
- 1 ton = 2000 lb = 2 kips = 907 kg
- 1 m>sec = 3.28 ft>sec
- 1 km>hr = 0.911 ft>sec = 0.621 mi>hr
