1 mm          0.03937 inch

1 cm          0.0328 feet

1 m           1.0936 yard

1 km          0.62137 mile

1 m           39.37 inch

 

1 in          25.4 mm

1 ft          30.48 cm

1 yd          0.9144 m

1 mi          1.6093 km

 

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1 cc          0.061 cubic-inch

1 liter              1.0567 quart

 

1 cu.in              16.39 cc

1 qt          0.9463 liter

 

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1 gram        0.03527 ounce

1 kg          2.2046 pound/lb

 

1 ounce              28.35 gram

1 lb          0.4536 kg

 

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1 mi          5280 ft

1 acre        43,560 sq ft

1 sq mi (1 'section') is 640 acres

1 sq acre     208.71 x 208.71 square

1 acre        10 sq chains / 160 sq rods

1 sq rod      30.25 sq yd

1 mi          320 rods

1 chain              792 in

1 rod         198 in

1 rod         16.5 ft / 5.5 yd

 

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F' to C' :   (x - 32) * (5/9)

C' to F' :   (x * (9/5)) + 32

 

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area tri:  (.5)(base)(height)

 

area cir:  (pie)(radius-squared)

circum  :  (pie)(diameter)

 

1 gal water   8.33 lb

 

light speed   186,000 mi per sec

 

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I 1

V 5

X 10

L 50

C 100

D 500

M 1000