Vitamin D Dose Converter & Safety Snapshot: IU to mcg
A user-friendly unit converter that translates Vitamin D doses between IU and mcg, then contextualizes the result within age-group–based ranges and UL thresholds, with brief safety notes and source citations.
Output
Converted dose
—
Recommended daily range (IU / mcg)
—
UL status
—
Safety tip
—
Source citations
Common conversion references
| IU | mcg | Notes |
|---|---|---|
| 1 | 0.025 | 1 IU = 0.025 mcg |
| 400 | 10 | Common infant RDA |
| 600 | 15 | Common dose for many children/adults |
| 800 | 20 | Older adults RDA |
| 1000 | 25 | Fortified foods reference |
| 4000 | 100 | UL for adults |
Tips and notes
- Conversion factor: 1 IU = 0.025 mcg; 1 mcg = 40 IU.
- RDA and UL values vary by age group. Use the age-group picker to contextualize results.
- Sun exposure and individual factors can affect vitamin D needs; supplements should be used as directed by a healthcare professional.