Length	Mass (Weight)
centimeters cm. or in. inches 2.54 1 0.394 5.08 2 0.787 7.62 3 1.181 10.16 4 1.575 12.70 5 1.969 15.24 6 2.362 17.78 7 2.756 20.32 8 3.150 22.86 9 3.543 25.40 10 3.937 50.80 20 7.874 76.20 30 11.811 101.60 40 15.748 127.00 50 19.685	kg. kg. or lbs. inches 0.454 1 2.205 0.907 2 4.409 1.361 3 6.614 1.814 4 8.819 2.268 5 11.023 2.722 6 13.228 3.175 7 15.432 3.629 8 17.637 4.082 9 19.842 4.536 10 22.046 9.072 20 44.092 13.608 30 66.139 18.144 40 88.185 22.680 50 110.231

Distance	Area
kilometres km. or miles miles 1.609 1 0.621 3.219 2 1.243 4.828 3 1.864 6.437 4 2.485 8.047 5 3.107 9.656 6 3.728 11.265 7 4.350 12.875 8 4.971 14.484 9 5.592 16.093 10 6.214 32.187 20 12.427 48.280 30 18.641 64.374 40 24.855 80.467 50 31.069	hectares (ha) .ha or acres acres 0.405 1 2.471 0.809 2 4.942 1.214 3 7.413 1.619 4 9.884 2.023 5 12.884 2.428 6 14.826 2.833 7 17.297 3.237 8 19.769 3.642 9 22.240 4.047 10 24.711 8.094 20 49.421 12.140 30 74.132 16.187 40 98.842 20.234 50 123.553

Surface or Area
1 sq. metre (m2)	= 10,000 cm2	= 1.1960 yds
1 hectare (ha)	= 10,000 m2	= 2.4711 acres
1 sq. km (km2)	= 100 hectares	= 0.3861 sq. mile
1 sq. yard	= 9 sq feet	= 0.8361 m2
1 acre	= 4840 sq yards	= 4046.9 m2

Capacity
1 cu metre (m3)	= 10,00 dm3	= 1.3080 cu yds
1 litre (l)	= 1 dm3	= 0.2200 gallon
1 cu yard	= 27 cu feet	= 0.7646 m3
1 pint	= 4 gills	= 0.5683 litre
1 galon	= 8 pints	= 4.5461 litre

US Dry Measure Equivalents
1 Pint	= 0.9689 UK pt	= 0.5506 lire
1 Bushel	= 0.9689 UK bu	= 35.238 litre

US Liquid Measure Equivalents
1 Pint (16 FL oz)	= 0.9327 UK pt	= 0.4732 lire
1 gallon	= 0.8327 UK gal	= 3.7853 litre