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For other uses, see Poncelet (disambiguation).

The poncelet (p) is an obsolete unit of power, once used in France and replaced by cheval vapeur (cv, metric horsepower). The unit was named after Jean-Victor Poncelet.[1]

One poncelet is defined as the power required to raise a hundred-kilogram mass (quintal) at a velocity of one metre per second (100 kilogram-force·m/s).

1 p 
= 980.665 W = 1⅓ cv (metric hp) = 1.315 hp (traditional horsepower)


  1. ^ François Cardarelli , Encyclopaedia of Scientific Units, Weights and Measures: Their Si Equivalences and Origins ,Springer, 2003,ISBN 185233682X, page 527