Sunburn & SPF Protection Timer
Calculate exactly how long you can safely stay in the sun without burning based on UV Index and SPF.
Sunburn & SPF Protection Timer
Calculate exactly how long you can safely stay in the sun without burning based on UV Index and SPF.
This calculator is for informational purposes only and does not constitute medical advice. Consult a healthcare professional for personalised guidance.
How This is Calculated
Time to sunburn (minutes) = (Minimum Erythemal Dose for skin type) ÷ (UV Index × 0.025). Fitzpatrick skin types I–VI have baseline MED values from 200–800 J/m². SPF extends time: protected time = unprotected time × SPF factor. Based on WHO UV Index system and Fitzpatrick (1988) skin phototype classification.
Disclaimer: This tool provides estimates for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
