Vitamin D IU to mcg converter
One label says 1,000 IU, another says 25 mcg. They are the same amount. Convert vitamin D and vitamin B12 between the units labels use.
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This converts the units on a label. It does not say how much to take. Ask your doctor or pharmacist about your dose.
The conversion factors
Vitamin D. 1 mcg of vitamin D is 40 IU, so 1 IU is 0.025 mcg. The factor is the same for vitamin D2 and D3. Source: the vitamin D fact sheet from the US National Institutes of Health Office of Dietary Supplements.
Vitamin B12. Labels give vitamin B12 by weight, in micrograms, and there is no IU figure for it. 1 mg is 1,000 mcg and 1 g is 1,000 mg. Source: the NIH vitamin B12 fact sheet.
IU conversions are different for every vitamin, and some have none, so this tool covers only these two. Other vitamins, such as vitamin A and E, use different factors depending on the form.
Common vitamin D amounts
| IU | mcg |
|---|---|
| 400 IU | 10 mcg |
| 600 IU | 15 mcg |
| 800 IU | 20 mcg |
| 1,000 IU | 25 mcg |
| 2,000 IU | 50 mcg |
| 5,000 IU | 125 mcg |
| 50,000 IU | 1,250 mcg (1.25 mg) |
Vitamins in the same place as your medication
Cadence takes a strength in IU, mcg or mg, the same way the label reads, so a vitamin D of 1,000 IU sits next to your other medications with its own reminder.
Vitamins, reminded
Cadence takes strengths in IU, mcg or mg and reminds you on time. Free, with no account.
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