Load ratio calculator
Your pack weight as a share of your body weight, placed against the two loads the source study actually measured. It does not tell you whether a pack is safe. Nothing can, and the study measured pressure, not harm.
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Your load
Both weights use the same unit, so they cannot be mixed by accident.
Used only in your browser. Nothing is sent anywhere or stored.
Fully loaded, with water, as you will actually carry it.
Companion to Module 5 · nothing is stored
Enter a body weight and a pack weight, both greater than zero, and your load ratio will appear here.
What this is based on
Moya-Cuenca C, Zúnica-García S, Gracia-Sánchez A, García-Cremades S, Oltra-Romero JA, Chicharro-Luna E. Plantar Pressure Responses to Backpack Load in Long-Distance Hikers: A Cross-Sectional Observational Study. Journal of Functional Morphology and Kinesiology. 2026;11(1):36.
- 39
- recreational hikers
- 2
- load levels tested, 10% and 20%
- Barefoot
- not in hiking footwear
- Cross-sectional
- a snapshot, not a follow-up
Blisters and injuries were not measured. It tells us load and foot pressure move together. It does not tell us what load causes harm.
Educational and planning guidance. Not medical advice.