Vitamin D IU to mg calculator
Vitamin D labels use IU, mcg or mg for the same amount. Enter the number on your label to see it in all three.
This is for vitamin D only. Nothing you type leaves your browser.
The conversion
1 mcg of vitamin D is 40 IU and 1 mg is 1,000 mcg, so 1 mg is 40,000 IU. The same factor applies to vitamin D2 and D3. Source: the vitamin D fact sheet from the US National Institutes of Health Office of Dietary Supplements.
This only converts the units on a label. It doesn't say how much to take. Ask your doctor or pharmacist about your dose, especially for high-strength products.
Common questions
What is 50,000 IU of vitamin D in mg?
1.25 mg, which is 1,250 mcg.
How many IU is 1.25 mg of vitamin D?
50,000 IU.
How many mg is 2,000 IU of vitamin D?
0.05 mg, which is 50 mcg.
How many mg is 600 IU of vitamin D?
0.015 mg, which is 15 mcg.
Does this work for other vitamins?
No. The factor differs for each vitamin, and some have none. Use this for vitamin D only.
Vitamins in the same place as your medication
Cadence takes a strength in IU, mcg or mg, the same way the label reads, and reminds you on time.
More free tools: Vitamin D IU to mcg converter, Tablet count and pill splitting calculator, Medication schedule maker, All free tools