Distance from fingers to elbow, estimated at 18 inches for a Biblical cubit, other cubits may vary. 1 Cubit = 45.72 centimeters = 0.4572 meters.
International survey foot defined as exactly 0.3048 meters by convention in 1959. This is the most common modern foot measure. US Survey may also be used but are nearly identical for short distances. 1 ft = 0.3048 m.