This page describes an obsolete unit.

The unit described on this page was in use prior to modern methods of precision measurement. It was based on a standard which is no longer available, and which is not capable of being calibrated against modern measurement units. Therefore, the equivalence to modern SI units or to current United States customary units can only be considered approximate.

The toise (never translated, though it was approximately the same as the fathom, and so could be rendered by that word in translation) was the base unit of length or distance of the French pre-revolutionary system of units. It was sometimes referred to as the toise de Perou. (See also Index of fathom-size units.)

Value in terms of modern unitsEdit

At the time the metric system was adopted in France, the toise was declared to be 1.9490365 m. This would be the equivalent of 2.131492235564308 yd.

For other values of the toise used elsewhere in France, see [1]

Relation to other French pre-revolutionary length unitsEdit


  1. Table of local values of the toise