Vitamin D Sun Exposure Estimator
Estimate the optimal minutes of sun exposure needed for Vitamin D synthesis based on skin type and UV index.
Vitamin D Sun Exposure Estimator
Estimate the optimal minutes of sun exposure needed for Vitamin D synthesis based on skin type and UV index.
Estimates are for 25% of body exposed (e.g. face and arms). Never stay out long enough to burn.
How This is Calculated
Sun exposure time for ~1,000 IU Vitamin D depends on UV Index and skin type: Fair skin = 10–15 min at UV 3; Medium skin = 15–25 min at UV 3; Dark skin = 25–45 min at UV 3. Estimates assume 25% body surface area exposed (e.g., face and arms). Production plateaus after about 15–20 min for fair skin.
Disclaimer: This tool provides estimates for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
