1 chain = 4 rds = 20.117 m
1 furlong = 10 chains = 201.17 m
1 mile = 8 furlongs = 1.6093 km
1 nautical mile = 2025.4 yds = 1.852 km
Area
1 square inch = 6.4516 cm2
1 square foot = 144 sq. ins = 0.0929 m2
1 square yard = 9 sq. ft = 0.8361 m2
1 acre = 4840 sq. yds = 4046.9 m2
1 square mile = 640 acres = 259 hectares
Weight
1 ounce (oz) = 437.6 grains = 28.350 g
1 pound (lb) = 16 oz = 0.4536 kg
1 stone = 14 lb = 6.3503 kg
1 hundredweight (cwt) = 112 lb = 50.802 kg
1 long ton = 20 cwt = 1.0161 t
Volume
1 cubic inch = 16.387 cm3
1 cubic foot = 1728 cu. ins = 0.0283 m3
1 cubic yard = 27 cu. ft = 0.7646 m3
Liquid Volume
1 fluid ounce (fl. oz) = 8 fl. drachms = 28.413 cm3
1 pint (pt) = 20 fl. oz = 568.26 cm3
1 pint = 4 gills = 0.5683 l
1 quart (qt) = 2 pt = 1.1365 l
1 gallon (gal) = 8 pt = 4.5461 l
1 bushel (bu) = 8 gal = 36.369 l
Liquid Volume (US)
1 fluid ounce (US) = 29.574 ml
1 pint (US) = 16 fl. oz (US) = 0.4723 l
1 gallon (US) = 8 pt (US) = 3.7854 l
Length
inches . inches . feet . yards . statute miles . nautical miles .
Area
square inches . square feet . square yards . acres . square miles .
Volume
cubic inches . cubic feet . cubic yards .
Liquid Volume
fluid ounces (UK) . fluid ounces (US) . pints (UK) . pints (US) . gallons (UK) . gallons (US) .
Weight
ounces (avoirdupois) . ounces (troy) . pounds . tons (long) .
Multiply by millimetres 25.4 centimetres 2.54 metres 0.3048 metres 0.9144 kilometres 1.6093 kilometres 1.852
Multiply by square centimetres 6.4516 square metres 0.0929 square metres 0.8361 hectares 0.4047 square kilometres 2.5899
Multiply by cubic centimetres 16.3871 cubic metres 0.0283 cubic metres 0.7646
Multiply by litres 0.0284 litres 0.0296 litres 0.5682 litres 0.4732 litres 4.546 litres 3.7854
Multiply by grams 28.3495 grams 31.1035 kilograms 0.4536 tonnes 1.016
Conversion factors: Metric to Imperial
Length Multiply by
millimetres . inches 0.0394 centimetres . inches 0.3937 metres . feet 3.2806 metres . yards 1.9036 kilometres . statute miles 0.6214 kilometres . nautical miles 0.54
Area Multiply by
square centimetres . square inches 0.155 square metres . square feet 10.764 square metres . square yards 1.196 hectares . acres 2.471 square kilometres . square miles 0.386
| 
