Converting pounds to metric tons (tonnes) is straightforward: one pound is exactly equal to 0.00045359237 metric tons. To perform the conversion, multiply the weight in pounds by this factor. For example, 5 pounds equals approximately 0.002268 metric tons (5 × 0.00045359237). Conversely, to convert metric tons to pounds, multiply the weight in metric tons by 2,204.62262185, since one metric ton equals exactly 2,204.62262185 pounds. These conversions are essential in fields like shipping, manufacturing, and agriculture, where both units are commonly used.