Daily Vitamin D Needs Calculator
Recommended vitamin D intake by age, with the adult upper limit.
Your result
Sunlight, diet and supplements all contribute. Taking more than the upper limit can cause harm, so check with a clinician before high-dose supplements.
Medical disclaimer: This tool is for education and is not medical advice. Read more.
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Frequently asked questions
What does the Daily Vitamin D Needs Calculator do?
Recommended vitamin D intake by age, with the adult upper limit. Enter your values and the result and chart update instantly.
How accurate is it?
It uses published, widely used formulas. Results are estimates for education and planning, not a diagnosis. Talk to a qualified clinician about decisions affecting your health.
Is my information stored or shared?
No. All calculations run in your browser and nothing you type is sent to a server or saved.
What can I search to find this tool?
People find it by searching for: how much vitamin d per day; vitamin d rda; vitamin d upper limit.