```---------------------------------------------------------
Quantity           English             Metric
---------------------------------------------------------
Length               1 mile        =    1.609347 km
1 yard        =    0.9144   m
1 foot        =    0.3048   m
1 inch        =   25.40     mm
---------------------------------------------------------
Area                 1 square mile =    2.590    km2
1 acre        = 4047        m2
1 acre        =    0.4047   ha
1 square yard =    0.8361   m2
1 square foot =    0.09290  m2
1 square inch =  645.2      mm2
---------------------------------------------------------
Volume               1 acre foot   = 1233        m3
1 cubic yard  =    0.7646   m3
1 cubic foot  =    0.02832  m3
1 cubic foot  =   28.32     l
100 board feet  =    0.2360   m3
1 gallon      =    3.785    l
---------------------------------------------------------
Mass                 1 lb          =    0.4536   kg
1 stone       =    6.3504   kg
---------------------------------------------------------
Mass/unit length     1 plf         =    1.488    kg/m
---------------------------------------------------------
Mass/unit area       1 psf         =    4.882    kg/m2
---------------------------------------------------------
Mass density         1 pcf         =   16.02     kg/m3
---------------------------------------------------------
Force                1 lb          =    4.448    N
1 kip         =    4.448    kN
---------------------------------------------------------
Force/unit length    1 plf         =   14.59     N/m
1 klf         =   14.59     kN/m
---------------------------------------------------------
Pressure etc.        1 psf         =   47.88    Pa
1 ksf         =   47.88    kPa
1 psi         =    6.895   kPa
1 ksi         =    6.895   MPa
---------------------------------------------------------```
Liquid Measure
1 Imperial Pint = 0.568 litre
1 American Pint = 0.473 litre
1 Imperial Gallon = 4.546 litres
1 American Gallon = 3.785 litres

1 litre = 0.220 Imperial gallon = 0.264 American gallon