Free tool
Vitamin D level checker & unit converter
Enter your 25-OH vitamin D result in either unit. See it converted, and checked against the standard adult deficient, insufficient, sufficient and possible-toxicity bands. Nothing you type is stored or sent anywhere.
Your result
Reference ranges vary by laboratory, testing method, age, sex and health condition (for example pregnancy or kidney disease). This tool gives general information only, not a diagnosis and not treatment advice. Always go by the range printed on your own lab report, and talk to your doctor about your result before starting or changing any supplement.
Standard adult 25-OH vitamin D reference range
These are the widely-used adult cut-offs that most Indian lab panels report against. Children, pregnant women and people with certain conditions can have different ranges: the range printed on your own report is the one that applies to you.
| Band | ng/mL | nmol/L | What it usually means |
|---|---|---|---|
| Deficient | Below 20 | Below 50 | Commonly linked to weak bones and poor calcium absorption. Discuss with your doctor. |
| Insufficient | 20 to 29 | 50 to 72.5 | Below what most guidelines treat as optimal. Many doctors suggest supplementation or a repeat test. |
| Sufficient (normal) | 30 to 100 | 75 to 250 | The range most labs and guidelines treat as adequate for a healthy adult. |
| Possible toxicity | Above 100 | Above 250 | Uncommon, usually from very high-dose supplementation over time. Needs prompt medical review. |
Questions
What is a normal vitamin D level?
For most healthy adults, a 25-OH vitamin D result of 30 to 100 ng/mL (75 to 250 nmol/L) is generally considered sufficient. Exact cut-offs vary slightly by lab and testing method, so always check the range printed on your own report.
What vitamin D level is considered deficient?
A 25-OH vitamin D level below 20 ng/mL (50 nmol/L) is commonly classed as deficient, and 20 to 29 ng/mL (50 to 72.5 nmol/L) as insufficient. Talk to your doctor about what a low result means for you and whether any supplementation is needed.
How do I convert vitamin D from nmol/L to ng/mL?
Divide the nmol/L value by 2.496 to get ng/mL. To go the other way, multiply the ng/mL value by 2.496. This tool does the conversion for you as you type, in either direction.
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