Sunscreen Quantity Calculator
How much sunscreen to pack for a day outdoors.
Your result
About 35 mL (roughly one ounce) covers an adult’s whole body once. Reapply every two hours and after swimming or sweating. Pair with shade and a hat.
Medical disclaimer: This tool is for education and is not medical advice. Read more.
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Frequently asked questions
What does the Sunscreen Quantity Calculator do?
How much sunscreen to pack for a day outdoors. Enter your values and the result and chart update instantly.
How accurate is it?
It uses published, widely used formulas. Results are estimates for education and planning, not a diagnosis. Talk to a qualified clinician about decisions affecting your health.
Is my information stored or shared?
No. All calculations run in your browser and nothing you type is sent to a server or saved.
What can I search to find this tool?
People find it by searching for: how much sunscreen to use; sunscreen amount per person; reapply sunscreen every 2 hours.