Enter the predicted UV index into the calculator to determine the suggested strength of sunscreen in SPF that you should apply for the day.
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Sunscreen Strength Formula
The following formula determines the strength of sunscreen needed on any given day.
- uvIndex >= 0 && uvIndex <= 2 = SPF 15-30
- uvIndex >= 3 && uvIndex <= 5 = SPF 30-50
- uvIndex >= 6 && uvIndex <= 7 = SPF 50+
- uvIndex >= 8 && uvIndex <= 10 = SPF 50+
- uvIndex >= 11 = SPF 50+ and additional protection
Additional protection in this case means physical protection such as full body covering clothes, hats, and other apparel.
In cases where the UV index is greater than 9, its really best to avoid going outside all together. If you do go outside, proper protection is paramount.
