Backpacking Pack Size Calculator

Find Your Perfect Backpacking Pack Size

Choosing the right backpack is one of the most important decisions for any backpacking trip. An ill-fitting pack can turn an amazing adventure into an uncomfortable slog, while the perfect fit distributes weight evenly and keeps you comfortable for miles.

Our Backpacking Pack Size Calculator takes the guesswork out of finding your ideal pack. By measuring your torso length, hip circumference, and considering your typical load weight and trip duration, you'll get personalized recommendations that match your body and hiking style.

Why Accurate Pack Sizing Matters

A properly sized backpack should sit comfortably on your hips (which carry 80% of the weight), with the shoulder straps providing balance rather than bearing the load. The right torso length ensures the hip belt aligns with your iliac crest, while adequate capacity means you won't be cramming gear or carrying unnecessary bulk.

Built for Outdoor Retailers and Adventure Brands

For outdoor retailers, gear rental companies, and adventure brands, this calculator helps customers make confident purchasing decisions while reducing returns. The form works beautifully as a standalone tool on your website or embedded directly into product pages.

Paperform makes it easy to create on-brand, mobile-friendly calculators that guide customers to the right gear. Use conditional logic to show different pack recommendations based on torso length and trip type, and connect the form to your CRM or email platform to follow up with personalized product suggestions.

Want to take it further? Use Stepper to automatically trigger follow-up emails with packing lists, route the submission to your sales team for high-value customers, or create a custom quote for guided trips—all based on how someone fills out the form.

Whether you're outfitting weekend warriors or thru-hikers, this calculator helps match every customer with their perfect pack.