SPF Protection Calculator

Find your ideal sunscreen protection based on skin type and conditions

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Your Details

Skin Type (Fitzpatrick Scale) Current UV Index (1-11+) Time Outdoors (minutes) SPF of Your Sunscreen

Activities

Swimming Heavy sweating Towel drying Sand / snow

Minutes Protected

Recommended SPF

Reapply Every

SPF Protection Comparison

SPF 1593.3% UVB blocked

SPF 3096.7% UVB blocked

SPF 5098.0% UVB blocked

SPF 10099.0% UVB blocked

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Reapplication Timer

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Set to your reapplication interval. Alerts when it's time.

Vitamin D Balance

Most adults need 10-30 minutes of midday sun on arms and legs, 2-3 times per week, for adequate vitamin D synthesis -- without sunscreen on those areas.

Skin Type	Time for Vitamin D	Then Apply SPF
I - II	10-15 min	Immediately after
III - IV	15-25 min	Immediately after
V - VI	25-40 min	Immediately after

If you wear SPF daily (recommended), consider a vitamin D3 supplement of 1000-2000 IU. Consult your doctor for blood level testing.

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