Medical-Grade IU Converter

← All Converters

Vitamin D3 (Cholecalciferol)

Vitamin D3 is crucial for bone health, immune function, and calcium absorption. 1 IU = 0.025 mcg.

IU → mcgmcg → IU

Enter value in IU

Result

0 mcg

Conversion factor: 1 IU = 0.025 mcg
Source: NIH Office of Dietary Supplements, WHO 2026

Common Dosages

IU	mcg
400 IU	10 mcg
1,000 IU	25 mcg
2,000 IU	50 mcg
5,000 IU	125 mcg
10,000 IU	250 mcg

Click any row to use that value in the calculator

Medical Disclaimer

This tool is for informational purposes only and is not intended as medical advice. Always consult a qualified healthcare provider before making any decisions about medication dosages.

Conversion factors based on NIH Office of Dietary Supplements and WHO 2026 International Standards.