Sunscreen Calculator

Published By: Calculator Academy

Last Updated: January 16, 2026

Enter the total number of adults, total number of children, and the length of the vacation into the calculator to determine the amount of sunscreen needed for your trip.

Sunscreen Calculator













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Sunscreen Formula

The following formula is used to calculate the amount of sunscreen needed for a trip.

SS = (A * 1.5 + C * 1) * D
  • Where SS is the ounces of sunscreen needed for the trip (oz)
  • A is the number of adults
  • C is the number of children
  • D is the number of days of the trip.

How to calculate the amount of sunscreen needed for a trip?

  1. First, determine the number of adults and children.
  2. Next, determine the length of the trip, or number of days spent outside.
  3. Finally, use the formula above to calculate the number of ounces of sunscreen you need for your trip.
sunscreen calculator