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Calcimator

Sunscreen Application Calculator

Calculate how much sunscreen you need for full coverage based on body areas and time outdoors.

Inputs

hrs
hrs

Results

Per Application

0.7 oz

Per Application4.2 tsp
Per Application20.7 mL
Total Applications2
Total Needed1.4 oz
Days per 6 oz Bottle4
How to Use This Calculator
  1. Enter your face area and body surface area to be covered in cm2.
  2. Set the SPF rating of your sunscreen.
  3. Review the Recommended Application Amount in grams for full protection.
  4. Check the Reapplication Interval output and set a timer accordingly.
  5. Use the Annual Product Usage figure to estimate how many bottles you need to purchase.

What each input means

Face
Include face coverage
Neck & Ears
Include neck and ears
Arms & Hands
Include both arms and hands
Legs & Feet
Include both legs and feet
Chest & Stomach
Include front torso
Back
Include back coverage
Hours Outdoors
Total hours spent outdoors
Reapply Every
Reapplication interval (every 2 hours recommended)

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Face = 1, Neck & Ears = 1, Arms & Hands = 1, Legs & Feet = 1 = 8 input(s) provided
  2. Calculate Per Application
    Per Application
    0.7 = 0.7
  3. Calculate Per Application
    Per Application
    4.2 = 4.2
  4. Calculate Per Application
    Per Application
    20.7 = 20.7

Engine last updated . Checked against 2 independently-derived tests — how we verify calculators.

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