Pack Cover Calculator
Find the right pack cover size based on your backpack volume.
Your pack's stated volume in litres
Affects estimated weight and durability
Toggle on if you strap gear outside (trekking poles, tent, bottles) — adds ~15% to effective volume
How We Calculate This
Pack covers are sized to match backpack volume ranges. Enter your pack volume and the calculator recommends the correct cover size.
External attachments (trekking poles, tent, water bottles strapped outside) increase the effective volume by approximately 15%. The calculator accounts for this when sizing up.
- XS: 15-25L
- Small: 25-35L
- Medium: 35-50L
- Large: 50-65L
- XL: 65-80L
- XXL: 80-100L
Frequently Asked Questions
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Last updated: February 2026
All calculations are estimates. Always verify conditions and use proper safety equipment outdoors.