How does SPF actually work?

 What does SPF mean? SPF tells you how well a sunscreen protects you from the UV rays that cause sunburn. SPF 30 blocks about 97% of those rays and SPF 50 about 98%. A higher number gives a little more protection, not extra time in the sun. Move the slider to compare SPF levels, and see why results can vary from one laboratory test to the next. 

Last reviewed 27 October 2026.

 

Sunscreen Hub / How does SPF actually work?

Sunscreen

About Accord

Accord Australasia is the peak industry body for the companies that make and supply sunscreen in Australia. We unite the industry, build consensus and give it a strong voice with regulators, government and the community. In sunscreen, that means advocating for testing, labelling and regulation that is robust, workable and backed by science, and supporting policies that encourage innovation, safety and consumer confidence. We equip our members with the knowledge and connections to meet Australia’s high standards, and we help Australians get accurate information about one of the most important health products they use.

Accord is the business owner of, and may trade under, other business names, including: Australian Sunscreen Council and Australian Sunscreen Association. We are aware of another organisation claiming to be the Australian Sunscreen Council and Accord has no affiliation with them. 

Important information

The information on these pages is general in nature and isn’t medical advice. For advice about your own skin, sun exposure or a reaction to a product, talk to your doctor or pharmacist, and always read and follow the directions on your sunscreen’s label. As an industry body, we don’t recommend or endorse any particular brand or product.

We review this content regularly, and each page shows when it was last reviewed. Regulations and scientific evidence can change, so check the date before relying on the information. Links to external websites are provided for convenience, and we aren’t responsible for their content.