A COMPARISON OF SOME BRITISH AND 

 METRIC UNITS 



Length 



Degrees Fahrenheit =*| C.°+ 32. 

 Degrees Centigrade ~$ (F.°-32). 



1 inch = 25*4 millimetres = 2*54 centimetres. 



1 foot = 304* 8 ,, =3 *48 



1 yard - - =91*44 



1 mile= 1609*3 metres = 1*609 kilometres. 



5 miles - = 8 kilometres (nearly) 



1 metre =1,000 millimetres = 39*37 inches. 

 1 centimetre = !^ metre = 0*39 inch. 

 1 kilometre =1,000 metres = 062 mile. 



To convert millimetres into inches, x*039. Converse, x 25*4. 

 To convert metres into yards, x 1*09. Converse, x '914. 



1 grain=o*o64 gramme = 64*8 milligrammes. 



1 ounce (avoir.)= 28*35 grammes =457* sjgrains. 



1 pound ,, =453*60 ,, = j kilogramme (approx.). 



1 cwt. - - = 50*8 kilogrammes. 



1 ton - =1,016 



1 kilogramme = 1,000 grammes 

 1 gramme ... 

 1 milligramme = l0 W gramme 



Weight 



= 2*2 pounds (avoir.). 

 = 15*432 grains. 

 = 0*0154 grain = fa grain 

 (nearly). 



To convert grammes into ounces, xo*0352. Converse, x 28*35. 

 To convert kilogrammes into pounds, x 2*2. Converse, x 0*454. 



1 fluid ounce = 28*4 cubic centimetres. 



1 pint =568*0 



1 gallon = 4*54 litres. 



1 peck = 9*08 ,, 



1 bushel = 36*32 ,, 



1 cubic inch = 16*38 cubic centimetres. 



Capacity.* ,, foot = 28*33 litres. 



1 litre =1,000 cubic centimetres = 1*76 pints (imperial) = 



61 cubic inches. 

 1 cubic centimetre =o*o6 1 cubic inch=i gramme of distilled 



water at its greatest density. 

 1 cubic metre = 1,000 litres = 35*3 cubic feet. 



To convert litres into pints, x 1*76. Converse, x '568. 



To convert litres into gallons, xo'22. Converse, x 4*543. 



To convert litres into cubic feet, x 0*03532. Converse, x 28*33. 



(1 foot -pound *= 0*138 kilogramme-metre. 

 WorkK 1 foot-ton =309*12 kilogramme-metres. 

 (1 kilogramme-metre = 7*2 5 foot-pounds. 



1 unit of heat (British) = heat necessary to raise 1 pound of water through 



i° F. 

 1 calorie (Metric) =heat necessary to raise 1 gramme of water through i° C. 

 Mechanical equivalent of heat-unit —TJ2 foot-pounds. 



calorie —424 gramme -metres. 



kilo -calorie = 424 kilogramme-metres. 



