13-season, average sleeper, 5000 ft
Inputs
Season3-Season
Sleep StyleAverage
Altitude5,000 ft
Pad R-Value3
Result
Temp Rating25°F
Base 25°F + 0°F style + 0°F altitude - 0°F pad = 25°F.
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Sleeping Bag Calculator
Temp Rating
25°F
Comfort
35°F
Fill
Synthetic
Recommended Temp Rating
25°F
3-Season
Comfort
35°
Rated
25°
Survival
10°
Recommendations
Fill TypeSynthetic or Down
Bag ShapeMummy or Semi-Rectangular
What You'll Need
oaskys Camping Sleeping Bag - 3 Season Warm & Cool Weather - Summer Spring Fall Lightweight Waterproof for Adults Kids - Camping Essentials Gear Accessories Hiking Sleep Must Haves
$25.99
View on Amazon
Naturehike 4.5oz Ultralight Washable Sleeping Bag Liner, Lightweight Adult Sleep Sack & Travel Sheets for Backpacking, Hotel, Camping, Hostels, ZY20 Green
$31.99
View on Amazon
Hikenture Camping Pillow with Removable Cover, Ultralight Inflatable Pillow
$21.84
View on Amazonoaskys Camping Sleeping Bag - 3 Season Warm & Cool Weather - Summer Spring Fall Lightweight Waterproof for Adults Kids - Camping Essentials Gear Accessories Hiking Sleep Must Haves
$25.99
View on AmazonNaturehike 4.5oz Ultralight Washable Sleeping Bag Liner, Lightweight Adult Sleep Sack & Travel Sheets for Backpacking, Hotel, Camping, Hostels, ZY20 Green
$31.99
View on AmazonHikenture Camping Pillow with Removable Cover, Ultralight Inflatable Pillow
$21.84
View on AmazonAs an Amazon Associate, we earn from qualifying purchases.
Price as of Jul 24, 2026. Product prices and availability are accurate as of the date indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
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Example Calculations
2Winter, cold sleeper, 10000 ft
Inputs
SeasonWinter
Sleep StyleCold
Altitude10,000 ft
Pad R-Value5
Result
Temp Rating-11°F
Base 10°F - 10°F cold - 17.5°F altitude + 6°F pad = -11.5°F.
Frequently Asked Questions
QWhat temperature rating sleeping bag do I need?
Choose a bag rated 10–15°F below the lowest temperature you expect. For 3-season camping (30–50°F lows), a 20–30°F bag is ideal.
- Summer (50°F+ lows): 35–50°F bag
- 3-season (30–50°F): 20–35°F bag
- Winter (0–30°F): 0–15°F bag
- Expedition (<0°F): -20°F or lower
| Season | Temp Rating | Fill | Weight |
|---|---|---|---|
| Summer | 35°F | Synthetic | 1–2 lbs |
| 3-Season | 20°F | Down 650FP | 2–3 lbs |
| Winter | 0°F | Down 800FP | 3–4 lbs |
QDoes sleeping pad R-value matter for warmth?
Yes, significantly. Your sleeping pad insulates you from ground cold. Each R-value point above 3 effectively adds about 3°F of warmth to your sleeping system.
- R-value 1–2: summer only, minimal insulation
- R-value 3–4: 3-season, good insulation
- R-value 5+: winter-rated, excellent insulation
- Higher R-value = warmer sleep system
QDo cold sleepers need a warmer bag?
Yes. Cold sleepers should subtract 10°F from the standard rating. If a 20°F bag would normally work, a cold sleeper should get a 10°F bag.
- Warm sleeper: +10°F comfort bonus
- Average sleeper: use rated temp
- Cold sleeper: -10°F, need warmer bag
- Women often sleep colder than men
QHow does altitude affect sleeping bag needs?
Temperature drops roughly 3.5°F per 1,000 feet above 5,000 feet. At 10,000 feet, expect it to be 17°F colder than at sea level.
- 5,000 ft: no significant adjustment
- 8,000 ft: ~10°F colder than sea level
- 10,000 ft: ~17°F colder
- 14,000 ft: ~31°F colder
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Last Updated: Jul 24, 2026
This calculator is provided for informational and educational purposes only. Results are estimates and should not be considered professional financial, medical, legal, or other advice. Always consult a qualified professional before making important decisions. UseCalcPro is not responsible for any actions taken based on calculator results.