Safe time by skin type
Skin type
No sunscreen
SPF 30
SPF 50
Type I
Very fair, always burns
7m
36m
46m
Type II
Fair, usually burns
10m
54m
1h 9m
Type III
Medium, sometimes burns
20m
1h 47m
2h 19m
Type IV
Olive, rarely burns
30m
2h 45m
3h 33m
Type V
Brown, very rarely burns
39m
3h 35m
4h 37m
Sea level, on land, UV held at 9. Sunscreen is counted the way most people apply it (about half the tested amount, roughly the square root of the SPF). Whatever the table says, reapply at least every 2 hours. Snow, sand and water reflect UV and shorten these times. Not medical advice.
What to do at UV 9
Avoid the midday sun. Shade, clothing, a hat, sunglasses and SPF 50 sunscreen; fair skin can burn in under 20 minutes.
Get a time for your skin, right now
Daisy reads the live UV where you are, follows how it changes through the day, and counts down your safe time for your skin type and sunscreen.
Open DaisyDaisy on your phone
Scan to open Daisy on your phone. The iPhone and Android apps, with a lock-screen countdown and a real alarm, are on their way.
Other UV levels