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Wondering how long your sunscreen will protect you in the sun? Use this simple calculator to estimate your sun-safe time based on your skin’s sensitivity and the SPF level of your sunscreen.

How to use:

1. Enter how many minutes it usually takes for your skin to start burning without sunscreen (e.g. 10 minutes).
2. Enter the SPF number of your sunscreen (e.g. SPF 30).
3. Click “Calculate” to see your estimated protection time.

? Don’t forget to reapply sunscreen every 2 hours or after swimming or sweating — even high SPF needs touch-ups!

This was created in collaboration with The Tool Directory.