Weights & Measures


LENGTH
centimetres
(cm)
cm or
inches
inches
(in)
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


Kilometres
(Km)
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
64.347 40 24.855
80.467 50 31.069


Weight
Kilograms
(Kg)
Kg or
lb
Pounds
(lb)
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
Tonnes
(T)
T or
UK tons
UK tonnes
(Metric Tonnes)
1.016 1 0.984
2.032 2 1.968
3.048 3 2.953
4.064 4 3.937
5.080 5 4.921
6.096 6 5.905
7.112 7 6.889
8.128 8 7.874
9.144 9 8.858
10.161 10 9.842
20.321 20 19.684
30.481 30 29.526
40.642 40 39.368
50.802 50 49.210


AREA
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 12.355
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


VOLUME
Litres
( l )
Litres or
UK Gallons
Gallons
4.546 1 0.220
9.092 2 0.440
13.638 3 0.660
18.184 4 0.880
22.730 5 1.100
27.276 6 1.320
31.822 7 1.540
36.368 8 1.760
40.914 9 1.980
45.460 10 2.200
90.919 20 4.400
136.379 30 6.600
181.839 40 8.800
227.298 50 11.000



SPEED
Km/h 10 20 30 40 50 60 70 80 90 100 110 120
 
mph 16 32 48 64 80 96 112 128 144 160 176 188



TYRE PRESSURE
lb/sq in 20 22 24 26 28 30 32 34
 
kg/sq cm 1.41 1.55 1.69 1.83 1.97 2.11 2.25 2.39

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