Sunburn timer

Prototype model. Adjust Skin Type, SPF, and UV Index to estimate maximum time in direct sun. All calculations assume you reapply after swimming, sweating, and at the latest every 2 hours.

Result

Estimated max safe time (bar)

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0 min 2h reapply 6h+

☀️ Max safe sun time

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Assumes proper application and reapplying every 2 hours and after swimming/sweating. Real-world conditions (clouds, reflection, altitude) can change exposure.

Inputs

Skin Type

Type III

SPF

SPF 30

UV Index

UVI 8