Theoretical Weights of Brass Rods and Bars for Hexagons Whitworth
(Imperial Sizes)
Size Across Flats
(in.) 		Size Across Flats
(in.) 		Size Across Flats
(mm.) 		Kilogrammes per Metre
(kg/m)		 Kilogrammes per 3.6 Metre Length
(kg/3.6m)		 Metres per Kilogrammes
(m/kg)		 Pounds per Foot
(lb/ft)
1/4 0.250 6.350 0.283 1.02 3.53 0.19
9/32 0.281 7.144 0.358 1.29 2.79 0.24
5/16 0.313 7.938 0.442 1.59 2.26 0.30
11/32 0.344 8.731 0.535 1.93 1.87 0.36
3/8 0.375 9.525 0.637 2.29 1.57 0.43
13/32 0.406 10.32 0.747 2.69 1.34 0.50
7/16 0.438 11.11 0.866 3.12 1.15 0.58
15/32 0.469 11.91 0.995 3.58 1.01 0.67
1/2 0.500 12.70 1.13 4.07 0.884 0.76
17/32 0.531 13.49 1.28 4.60 0.783 0.86
9/16 0.563 14.29 1.43 5.16 0.698 0.96
19/32 0.594 15.08 1.60 5.75 0.627 1.07
5/8 0.625 15.88 1.77 6.37 0.566 1.19
21/32 0.656 16.67 1.95 7.02 0.513 1.31
11/16 0.688 17.46 2.14 7.70 0.467 1.44
3/4 0.750 19.05 2.55 9.17 0.393 1.71
13/16 0.813 20.64 2.99 10.76 0.335 2.01
7/8 0.875 22.23 3.47 12.48 0.289 2.33
15/16 0.938 23.81 3.98 14.32 0.251 2.67
1" 1.000 25.40 4.53 16.30 0.221 3.04
1-1/16 1.063 26.99 5.11 18.40 0.196 3.43
1-1/8 1.125 28.58 5.73 20.63 0.175 3.85
1-3/16 1.188 30.16 6.38 22.98 0.157 4.29
1-1/4 1.250 31.75 7.07 25.46 0.141 4.75
1-3/8 1.375 34.93 8.56 30.81 0.117 5.75
1-7/16 1.438 36.51 9.35 33.68 0.107 6.29
1-1/2 1.500 38.10 10.19 36.67 0.098 6.84
1-5/8 1.625 41.28 11.95 43.03 0.084 8.03
1-3/4 1.750 44.45 13.86 49.91 0.072 9.32
1-7/8 1.875 47.63 15.92 57.29 0.063 10.69
2" 2.000 50.80 18.11 65.19 0.055 12.17
2-1/4 2.250 57.15 22.92 85.50 0.044 15.40
2-1/2 2.500 63.50 28.29 101.86 0.035 19.01
2-3/4 2.750 69.85 34.24 123.25 0.029 23.00
3" 3.000 76.20 40.74 146.67 0.025 27.38