USEFUL DATA AND FORMULA 



WEIGHTS AND MEASURES 

 Comparison between Metric and British Systems. 



I gramme . . =;i 5-4323 5 grains. 



I cubic centimetre = i gramme of distilled water 



I litre . . . = 1000 c.c. = i cubic decimetre 



I decalitre . . = 10 litres = 10 cubic decimetres 



I kilolitre . . = 1000 litres =: i cubic metre 



I metre . . ==39*371 inches. 



I centimetre . =0-39371 inches. 



I millimetre . =0-03937 inches. 



I inch . . . =2-5425 centimetres. 



= 17 minims (actually 16-90 in.-). 

 = 1-76 pint (actually I-7598). 

 = 9-08 quarts. 

 = 220-096 gallons. 



CIRCULAR MEASURES 



Circumference of a circle = diameter x 3-14. 



Area of a disc . . = square of diameter x -7854. 



Area of a sphere . . = square of diameter x 3-14159. 



USEFUL FACTORS 



To convert Multiply by 



Grammes to ounces ...... -035 



Ounces to grammes ...... 28-36 



Litres to gallons -22 



Gallons to litres ...... 4-54 



Centimetres to inches ..... -4 



Inches to centimetres 2-5 



Kilogrammes to pounds . . . . .2-2 

 Pounds to kilogrammes -45 



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