HikeCalc
Sleeping Bag Temperature Calculator
Calculates the right rating for your specific conditions — not just the forecast temperature.
Night conditions
5°C
-30°C20°C
1000 m
0 m5000 m
Shelter type
About you
Sleeper type
Sex
Your gear
3
07
Sleeping bag liner
Recommended rating
Summer6°C
Lower limit rating — suitable for most male hikers
Where your rating falls
Summer3-SeasonWinterExpedition
5°-5°-15°
Breakdown
0°CComfort rating
6°CLower limit
5°CEffective felt temp
NoneLiner benefit
R3Pad — Good (R3)
Find a bag rated to 6°C
Based on your inputs, this is the temperature rating that will keep you comfortable. Look for this number on the bag's EN/ISO certification tag.
Browse sleeping bags by rating →Methodology: Effective temperature derived from forecast low, adjusted for shelter insulation, altitude wind-chill above 1,500m, and ground conduction loss via sleeping pad R-value. A 5°C safety margin is applied before accounting for sleeper type. Comfort and lower limit follow EN/ISO 23537 conventions: the lower limit sits 6°C below the comfort rating.