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A pace is a unit of length consisting either of one normal walking step (~0.75 m), or of a double step, returning to the same foot (~1.5 m). Like other traditional measurements, paces started as informal units but have since been standardized, often with the specific length set according to a typical brisk or military marching stride.
Kilometer or kilometre is one of the most common metric units of length or distance. It is equal to 1 000 meters. It is about 0.62137119 mile, 1093.6133 yards, or 3280.8399 feet. Plural name is kilometers.