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Calculate International Units

Calculator for international units (IU) for vitamins and insulin. International units are used to measure the masses of medical substances. One international unit of a certain substance always corresponds to a certain mass of that pure substance. The mass is given in milligrams or micrograms, 1 microgram is 1/1000 milligram and 1 milligram is 1/1000 gram.

International units:IU

Please choose a substance and enter one value, the other values will be calculated.

Of vitamin E, there are may varieties, here is meant the most common form, d-α-tocopherol.

The values in μg per IU are:

Vitamin A: 0,3
Beta-carotene: 0,6
Vitamin B1: 3
Vitamin C: 50
Vitamin D3: 0,025
Vitamin E: 671
Insulin (free from water): 34,7
Insulin (ultrapure): 41,67

as at October 2022

The system of international units is determined by the World Health Organization (WHO). It contains precisely defined quantities per unit of many preparations used in medicine and thus allows exact dosing worldwide using this information. The international units date back to 1931, when standards for the most common vitamins were introduced for the first time. These have been refined since then and expanded to include numerous other substances. The World Health Organization has been taking care of this since 1953.
There are recommendations for the preparations as to how many international units should be taken, when and how often. These recommendations are made by medical professionals and are of course based on the diagnosis, but also on age, gender, body weight and other factors. These recommendations should be followed.

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