Units and Their Conversion

M

1 metre (1 m) = 100 centimetres (100 cm)

1 metre (1 m) = 1000 millimetres (1000 mm)

1 kilometre (1 km) = 1000 m

12 in. = 1 ft

3 ft = 1 yd

5280 ft = 1 mile

1760 yd = 1 mile

1 ft = 30.48 cm

1 m = 3.28 ft

1 in. = 25.4 mm

1 mile = 1.61 km

1 yd = 0.914 m

1 sq metre (1 m2) = 10 000 cm2

1 sq metre (1 m2) = 1 000 000 mm2

10 000 m2 = 1 hectare (1 ha)

1 sq km (1 km2) = 1 000 000 m2

1 ft2 = 144 in.2

1 yd2 = 9 ft2

1 sq mile = 640 acre = 1 section

1 in.2 = 6.45 cm2= 645 mm2

1 m2 = 10.8 ft2

1 acre = 0.405 ha

1 sq mile = 2.59 km2

1 m3 = 1 000 000 cm3

1 m3 = 1 x 109 mm3

1 dm3 = 1 litre

1 litre = 1000 cm3

1 mL= 1 cm3

1 m3 = 1000 litres

1 ft3 = 1728 in.3

1 yd3 = 27 ft3

1(liquid) U.S. gallon = 231 in.3

1(liquid) U.S. gallon = 4 (liquid) quarts

1 U.S. barrel (bbl) = 42 U.S. gal.

1 imperial gallon = 1.2 U.S. gal.

1 in.3 = 16.4 cm3

1 m3 = 35.3 ft3

1 litre = 61 in.3

1 U.S.gal = 3.78 litres

1 U.S. bbl = 159 litres

1 litre/s = 15.9 U.S. gal/min

1 kilogram (1 kg) = 1000 grams

1000 kg = 1 tonne

2000 lb = 1 ton (short)

1 long ton = 2240 lb

1 kg (on Earth) results in a weight of 2.2 lb

(on Earth) a mass density of 1kg/m3 results in a weight density of 0.0623 lb/ft3

In SI R.D. is a comparison of mass density to a standard. For solids and liquids the standard is fresh water.

In Imperial the corresponding quantity is specific gravity; for solids and liquids a comparison of weight density to that of water.

In both systems the same numbers hold for R.D. as for S.G. since these are equivalent ratios.

Water (fresh)...............1.00

Water (sea average) ....1.03

Aluminum...................2.56

Antimony....................6.70

Bismuth.......................9.80

Brass ...........................8.40

Brick ...........................2.1

Calcium.......................1.58

Carbon (diamond).......3.4

Carbon (graphite)........2.3

Carbon (charcoal) .......1.8

Chromium...................6.5

Clay.............................1.9

Coal.............................1.36-1.4

Cobalt .........................8.6

Copper ........................8.77

Cork ............................0.24

Glass (crown)..............2.5

Glass (flint).................3.5

Gold ..........................19.3

Iron (cast)....................7.21

Iron (wrought) ............7.78

Lead ..........................11.4

Magnesium .................1.74

Manganese..................8.0

Mercury ....................13.6

Mica............................2.9

Nickel .........................8.6

Oil (linseed) ................0.94

Oil (olive) ...................0.92

Oil (petroleum) ...........0.76-0.86

Oil (turpentine) ...........0.87

Paraffin .......................0.86

Platinum....................21.5

Sand (dry) ...................1.42

Silicon.........................2.6

Silver.........................10.57

Slate ............................2.1-2.8

Sodium........................0.97

Steel (mild) .................7.87

Sulphur .......................2.07

Tin...............................7.3

Tungsten ...................19.1

Wood (ash) .................0.75

Wood (beech) .............0.7-0.8

Wood (ebony).............1.1-1.2

Wood (elm).................0.66

Wood (lignum-vitae) ..1.3

Wood (oak).................0.7-1.0

Wood (pine)................0.56

Wood (teak) ................0.8

Zinc.............................7.0

Alpha

Epsilon

Theta