Vitamin D Sun Exposure Calculator

Estimate how much vitamin D your body can produce from sun exposure based on age, skin type, and time spent outdoors.

Duration in sun: ${duration} minutes

Body exposure: ${body}%

Age factor applied: ${ageFactor}

Note: Actual vitamin D synthesis varies with latitude, season, and time of day.

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Vitamin D Production Chart for US

Vitamin D synthesis changes by skin type and sun exposure. For a 30-minute sun session:

• Very Fair skin: ~3000 IU
• Fair skin: ~2700 IU
• Medium skin: ~2250 IU
• Olive skin: ~1800 IU
• Brown skin: ~1350 IU
• Dark Brown skin: ~900 IU

Older adults over 50 may produce roughly 20% less than younger adults. Body coverage significantly impacts vitamin D, with full body exposure producing up to 10 times more than just face and hands.