Health
Vitamin D Calculator
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Estimate your daily vitamin D needs based on age, sun exposure, and diet. See how much you get from each source and whether you need a supplement.
Sådan bruger du dette værktøj
- Enter your age and answer the questions on sun exposure and diet.
- Your likely intake from sun and food is compared against general daily reference targets.
- Read the estimated gap and whether a supplement may help close it.
StatusLikely sufficient
From sun
400
IU/day
From diet
300
IU/day
RDA target
600
IU/day
Natural intake meets RDANo supplement needed
Your sun and diet intake may meet your daily needs. Still consider a supplement in winter months or if you live at high latitude.
Estimates based on NIH / Endocrine Society guidelines. Sun synthesis varies with skin tone, latitude, and season. Consult a healthcare provider before starting supplements.
Ofte stillede spørgsmål
- How does it estimate my needs?
- It compares your likely intake — from sun exposure, diet, and any supplement — against general daily reference targets that rise with age, then shows the gap.
- Why does sun exposure matter?
- Skin makes vitamin D from sunlight, so latitude, season, time outdoors, and skin tone all change how much you produce, which the questions try to capture roughly.
- Can it tell me if I am deficient?
- No. Only a blood test can confirm vitamin D status. This is an estimate for general information, not medical advice; talk to a healthcare professional before starting a supplement.
- Is what I enter kept private?
- Yes. Your age and the answers about sun and diet are used only in your browser to produce the estimate; none of it is uploaded or stored.