123 pounds (lbs) is equal to 55.7919 kilograms (kg). To convert pounds to kilograms, you can use the conversion factor 1 pound = 0.453592 kilograms. So, you multiply the number of pounds by 0.453592 to get the equivalent weight in kilograms. In this case, 123 lbs multiplied by 0.453592 equals 55.7919 kg.
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