**Fifty pounds is equal to 22.68 kilograms.** When calculating the conversion in fractions the results are always rounded to the nearest 1/64. The decimal result is the most accurate of the three options.

When calculating the conversion in fractions the results are always rounded to the nearest 1/64. The decimal result is the most accurate of the three options. A kilogram is equal to the mass of the IPK or International Prototype of the Kilogram. This is a block that was manufactured in 1889 of platinum-iridium alloy and then stored in Sevres, France, at the International Bureau of Weights and Measures. It is unique in that it is the only SI unit that is not defined by a fundamental physical property but rather by a physical object.