Convert vitamin E between milligrams and IU values. Track natural and synthetic alpha tocopherol differences. Review charts, formulas, exports, examples, and practical steps confidently.
Use the fields below to convert vitamin E amounts and compare both labeling systems in one place.
The graph compares natural and synthetic conversion lines, so you can see how the same input changes by vitamin E form.
| mg Input | Natural IU | Synthetic IU | IU Input | Natural mg | Synthetic mg |
|---|---|---|---|---|---|
| 5.00 | 7.45 | 11.10 | 10.00 | 6.70 | 4.50 |
| 15.00 | 22.35 | 33.30 | 25.00 | 16.75 | 11.25 |
| 25.00 | 37.25 | 55.50 | 50.00 | 33.50 | 22.50 |
| 67.00 | 99.83 | 148.74 | 100.00 | 67.00 | 45.00 |
| 100.00 | 149.00 | 222.00 | 200.00 | 134.00 | 90.00 |
| 268.00 | 399.32 | 594.96 | 400.00 | 268.00 | 180.00 |
Vitamin E labels can use milligrams or international units. The conversion depends on whether the product uses natural or synthetic alpha-tocopherol.
Natural IU = mg × 1.49Synthetic IU = mg × 2.22Natural mg = IU × 0.67Synthetic mg = IU × 0.45This calculator applies the factor tied to your selected form, then also shows the other form for easy comparison.
They do not use the same biological activity factor. Natural alpha-tocopherol is more potent per milligram, so it converts to fewer milligrams per IU and more IU per milligram.
Labels often mention d-alpha-tocopherol or RRR-alpha-tocopherol for natural forms. Always read the supplement facts panel carefully because mixed tocopherol products can present information differently.
Synthetic products often mention dl-alpha-tocopherol or all-rac-alpha-tocopherol. Those labels should use the synthetic conversion factor when you switch between milligrams and international units.
Yes. Enter the number exactly as shown, then choose the matching unit direction and vitamin form. That keeps the output aligned with the product label.
It converts labeled alpha-tocopherol units. It does not estimate absorption, food composition, or how mixed tocopherols behave in the body after digestion.
That field helps compare your converted amount with a personal reference value, such as a plan target or daily goal. It adds context without changing the core conversion math.
Use them when you want to save a record, share results, or attach the conversion summary to a nutrition worksheet, supplement review, or client file.
No. It is a conversion and planning tool. Dosing questions, supplement safety, medication interactions, and individual health decisions should be reviewed with a qualified clinician.
Use this page when checking supplement labels, comparing brands, or documenting conversions for nutrition planning.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.