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Standard SI enheter

Figuren til venstre viser standard SI-enheter.

Noen engelske/amerikanske enheter
1 mile  mil = 1760 yd         = 1609.35    m
1 yard  yd  =    3 ft = 36 in =    0.9144  m
1 foot  ft            = 12 in =    0.30480 m
1 inch  in                    =    0.02540 m

1 g           g0   = 9.80665 m/s2 = 32.1740 ft/s2

1 pound       lb   = 0.45359237 kg
1 pound-force lbf  = 4.448222   N
1 slug        slug = 1 lbf·ft/s2   - One slug is a mass equal to 32.1740 lb (exerts a force downward of 32.1740 lbf)