30 pounds is approximately 13.6078 kilograms. The conversion between pounds and kilograms is based on the fact that 1 pound is equal to 0.453592 kilograms. To convert pounds to kilograms, you multiply the number of pounds by 0.453592. So, for 30 pounds, the calculation would be 30 * 0.453592 = 13.6078 kilograms. This conversion is useful in various contexts, such as cooking, science, and everyday weight measurements.