Units and Equivalences - Greenhouse Technology and Management - page 299

Appendix 3
Units and Equivalences

Length

1 nanometre (nm) = 10 −9 metres (m)
1 micron or micrometre (mm) = 10 −6 metres (m)
1 millimetre (mm) = 10 −3 metres (m)

1 centimetre (cm) = 10 −2 metres (m)

1 centimetre (cm) = 0.394 inches

1 metre (m) = 1.094 yards

1 metre (m) = 3.281 feet

1 metre (m) = 39.37 inches

1 kilometre (km) = 1000 metres (m)

1 kilometre (km) = 0.621 miles

1 inch = 2.54 centimetres (cm)

1 foot = 30.48 centimetres (cm)

1 yard = 0.914 metres (m)

1 mile = 1.609 kilometres (km)

Area

1 square metre (m 2 ) = 1.196 square yards
1 square metre (m 2 ) = 10.764 square feet
1 hectare (ha) = 10,000 square metres (m 2 )

1 hectare (ha) = 2.47 acres

1 acre = 0.4047 hectares (ha)

Volume

1 cubic metre (m 3 ) = 1000 litres (l)
1 cubic metre (m 3 ) = 1.308 cubic yards