Backpack Capacity Calculator
Estimate the backpack size a trip needs from days, season, and shelter.
Quick answer: enter your details below and click Estimate Pack Size — your result appears instantly, right here in your browser. Nothing you enter is uploaded or stored.
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Enter your details below.
How to use
- Enter trip length in days.
- Pick the season and shelter type.
- Click Estimate Pack Size.
About this tool
Enter trip length, season, and whether you carry a tent. The tool builds a litre estimate from a base load plus per-day and seasonal additions. This is a rough planning estimate: packing style and gear bulk move real needs a lot.
Frequently asked questions
Is bigger always better?
No. An oversized pack invites overpacking, and the extra weight slows you down.
Does it cover food and water?
The per-day addition is meant to cover food and consumables in rough terms.