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Bear Canister Calculator

Size your bear canister for any trip length

Volume Needed

800 cu in

Liters

13.1 L

Rec.

BV450

Storage Volume Needed

800

cubic inches (13.1 L)

Canister Options

BV450 (Garcia)

450 cu in

2 needed
BV500 (BearVault)

500 cu in

2 needed
Frontiersman/UDAP

615 cu in

2 needed
BV450 + Ursack

700 cu in

2 needed

Example Calculations

12 people, 4-day trip, standard meals

Inputs

People2
Days4
Meal StyleStandard

Result

Volume800 cu in (2 x BV450)

2 × 4 × 100 = 800 cu in. One BV450 (450) is not enough; need two.

2Solo, 3-day trip, ultralight

Inputs

People1
Days3
Meal StyleUltralight

Result

Volume240 cu in (BV450)

1 × 3 × 80 = 240 cu in. BV450 fits easily.

Frequently Asked Questions

Q

What size bear canister do I need?

A solo hiker needs roughly 100 cubic inches of canister space per day for standard meals. The BV500 (500 cu in) fits 3–4 days of food for one person.

  • Solo 2–3 days: BV450 (450 cu in)
  • Solo 3–4 days: BV500 (500 cu in)
  • Solo 5+ days: BV500 + Ursack
  • Group of 2: double the solo amount
CanisterVolumeSolo DaysWeight
BV450450 cu in2–3 days33 oz
BV500500 cu in3–4 days41 oz
Frontiersman615 cu in4–5 days44 oz
Q

How much food fits in a bear canister per day?

Standard trail food occupies about 100 cubic inches per person per day. Ultralight dehydrated food is more compact at 80 cu in/day, while gourmet meals need 130 cu in/day.

  • Ultralight meals: 80 cu in/person/day
  • Standard trail food: 100 cu in/person/day
  • Gourmet/fresh food: 130 cu in/person/day
  • Tip: repackage food to eliminate air space
Q

Do I need a bear canister or bear bag?

Many national parks and wilderness areas require approved hard-sided bear canisters. Bear bags (like Ursack) are accepted in some areas but not all.

  • Required: Yosemite, SEKI, parts of Sierra
  • Optional but recommended: most backcountry
  • Ursack: lighter but not always approved
  • Check local regulations before your trip
Q

What else goes in the bear canister besides food?

Anything with a scent: food, snacks, toothpaste, sunscreen, lip balm, and trash. These items all need canister space, which this calculator accounts for.

  • All food and snacks
  • Toiletries (toothpaste, sunscreen)
  • Scented items (lip balm, hand sanitizer)
  • Trash and food packaging

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Last Updated: Mar 20, 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.

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