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Vitamin D Calculator
Estimate your daily Vitamin D synthesis from sun exposure based on skin type, latitude, and season.
☀️ Vitamin D Sun Exposure Calculator
Skin Type
Type I – Very fair, always burns
Type II – Fair, usually burns
Type III – Medium, sometimes burns
Type IV – Olive, rarely burns
Type V – Brown, very rarely burns
Type VI – Dark, never burns
Season / UV Index
Winter (UV 1–2)
Spring/Autumn (UV 3–5)
Summer (UV 6–8)
Peak Summer (UV 9+)
Body Exposure (%)
Face & hands only (~5%)
Arms & face (~15%)
Arms, legs & face (~25%)
T-shirt & shorts (~50%)
Swimsuit (~80%)
Sun Exposure Time (minutes)
Estimate Vitamin D
IU of Vitamin D synthesized (estimated)
vitamin D
sun exposure
IU
skin type
UV
sunlight
deficiency
health
supplement
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