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Calcimator

Layering System Calculator

Clothing layers from activity level and temperature.

Inputs

Results

Required CLO value

1.46

Wind chill (°F)34
Effective temp (°F)42
Base layer1
Mid layers1
Wind shell0
Insulated jacket0
Total layers2
How to Use This Calculator
  1. Enter expected temperature range (°F or °C), precipitation probability (%), and wind speed (mph).
  2. Enter activity level (resting, light hiking, strenuous) and trip duration (hours or days).
  3. Read recommended base layer, mid layer, and shell specifications for the conditions.
  4. Review insulation weight (g) and packability for the mid layer recommendations.
  5. Adjust the system for versatility — choose layers that can be worn in multiple combinations.
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