SPF

What Does SPF 30 Mean?

What does the 30 in SPF 30 mean? Does it tell us how long its effect lasts on the skin, or does it tell us something else?

What does the 50 in SPF 50 tell us? Does it indicate how often we reapply the sunscreen?

Is the 50 in SPF 50 an indicator of when to reapply the sunscreen?

What SPF measures can be a bit confusing to understand. In this post, I explain the essential facts about SPF numbers and what they actually measure.

SPF calculation explained in an easy-to-understand way | Examples | Is SPF number what we should look at when it comes to knowing when to reapply

What we think it measures is not what SPF measures…Keep reading to find out more about what SPF number actually tells us about that sunscreen…