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