½ inch = 12.70 millimetres
1 inch = 25.40 millimetres
2 inches = 50.80 millimetres
1 foot = 30.48 centimetres
1 yard = 0.914 metres
¼ mile = 400 metres
½ mile = 800 metres
1 mile = 1.6 km
3½ miles = 5.6 km
4½ miles = 7.2 km
15 miles = 24 km
20 miles = 32 km
60 miles = 96 km
200 miles = 320 km
1 acre = 0.4 hectares
2½ acres = 1 hectare