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Sunbathing Calculator
Estimate safe sun-exposure time with sunscreen.
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Sunscreen multiplies the time before you burn, while a higher UV index shortens it.
The math behind it
safe time = (your burn time at UV 1 / UV index) x SPF. Reapply regularly - SPF wears off.
Worked Example
SPF 30 at UV 7 with a 200-minute base burn time gives about 857 minutes (but reapply!).Frequently Asked Questions
Is this exact?
No - it's a guide; sweat, water and uneven application reduce real protection.
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