How many mg is 500000 IU?

The conversion factor for International Units (IU) to milligrams (mg) varies depending on the substance being measured. For Vitamin D, the conversion factor is typically 40 IU to 1 mcg (microgram) or 1000 IU to 25 mcg. Therefore, to convert 500,000 IU of Vitamin D to milligrams, you would divide by 40 to get 12,500 mg or divide by 25 to get 20,000 mg, depending on the specific conversion factor used.