Vitamin E (natural, RRR-α-tocopherol) unit converter
Intake dose of natural vitamin E (RRR-α-tocopherol, formerly d-α-tocopherol): IU to mg. 1 IU = 0.67 mg.
Also known as: d-alpha-tocopherol, d-α-tocopherol, RRR-alpha-tocopherol, Vitamin E natural, IE, IU
Converter
Enter a value in any unit and all other units fill in.
Dose conversions apply only to the substance and form named here. Do not use them to dose medicines; follow the label, the package leaflet and your prescriber.
Worked example
1000 IU = 670 mg
Conversion formulas
| IU | IU = mg × 1.493 | mg = IU × 0.67 |
|---|---|---|
| µg | µg = mg × 1000 | mg = µg × 0.001 |
Reference range
Doses have no reference range.
Source: EFSA (2024) Tolerable upper intake level for vitamin E, Table 3 (PMC) · Last reviewed: 2026-10-14
Note from the source: EFSA Table 3: 1 IU = 0.67 mg RRR-alpha-tocopherol (USP). Free tocopherol only; esters use other factors.