Das foot-pound ist eine britische und US-amerikanische Einheit sowohl der Arbeit oder Energie als auch des Drehmoments (dort auch Pound-foot). Das Einheitenzeichen ist ft·lb.

Ein foot-pound entspricht genau 1,355.817.948.331.400.4 J (Joule) und berechnet sich mit:

1 \,\mathrm{ft} \cdot \mathrm{lb} = \mathrm{lb} \cdot g_\mathrm{Gravitation} \cdot \mathrm{ft} = 0.45359237 \,\mathrm{kg} \,\cdot \,9.80665 \,{\mathrm{m} \over \mathrm{s}^2} \cdot \mathrm{lb} = 1.35581\dots \,\mathrm{kg} {\mathrm{m}^2 \over \mathrm{s}^2} = 1.355\,817\,948\,331\,400\,4 \,\mathrm{J}

550 Foot-pound in der Sekunde entsprechen einem PS (763 Watt). Das foot-pound kann folgendermaßen berechnet werden:

W = F x D

Wobei W die Arbeit (in foot-pound), F die Kraft (in pound) und D die Strecke (in foot) über die die Kraft angewendet wird, ist.

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