m/s        2.237     mph        - meters per second to miles per hour
kph        0.6214    mph        - kilometers per hour to miles per hour
mm         0.03937   in         - millimeters to inches
#/m^2      0.0929    #/ft^2     - number per square meter to number per square foot
#/m^2      4046.7    #/acre     - number per square meter to number per acre
kg/m^2     0.2048    lb/ft^2    - kilograms per square meter to pounds per square foot
kg/m^2     8921.1    lb/acre    - kilograms per square meter to pounds per acre
deg C day  1.8       deg F day  - degree centigrade days to degree farenheight days
m          3.2808    ft         - meters to feet
deg C      special   deg F      - degree centigrade to degree farenheight (multiply by 1.8 then add 32
kg/m       0.6271    lb/ft      - kilograms per meter to lbs per foot
cm^2/plant 0.001076  ft^2/plant - square centimeter to square foot
cm^2/plant 0.155     in^2/plant - square centimeter to square inch