Estimate how long sunscreen protects your skin. Fair skin that burns in 15 minutes gets a theoretical 7.5 hours from SPF 30, but reapplication every 2 hours still rules.
Theoretical protection
450 minutes theoretical (reapply every 2 hours)
Protected hours
7.5
Unprotected burn time
15 min
Reapply every
120 min
This calculator provides a general theoretical estimate only and is not medical advice or a guarantee of sun protection. Follow the sunscreen label, reapply as directed and after water, sweat, or toweling, and use shade and protective clothing. Speak with a qualified healthcare professional about photosensitivity, medications, skin conditions, unusual reactions, or personal skin-cancer risk.
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