Calculate travel days, water, calories, and total bag weight for your bug out plan based on distance to your destination, terrain, fitness level, and group size.
A bug out bag (BOB) is a self-contained kit designed to sustain you while traveling on foot from a dangerous location to a safer destination. The key variables are how far you need to travel, what terrain you'll cross, how fit your group is, and how long you'll be moving. This calculator estimates travel days, supplies needed, and total bag weight — plus a full gear list with estimated weights to keep you under the safe carrying limit.
A bug out bag is built around the concept of getting from point A (danger) to point B (safety) under your own power with everything you need on your back. Unlike a shelter-in-place situation where you can access your full home pantry, a BOB must be a self-contained system. Every pound matters, which is why systematic planning is essential rather than just throwing gear into a bag.
The military and serious backpackers follow a rule: your loaded pack should not exceed 30% of your body weight for a fit person, and 20% for average fitness. Exceed this and you risk injury, exhaustion, and reduced speed — exactly what you can't afford in a genuine emergency. The lightest version of your kit that covers all critical needs is always the best version.
Practice your bug out plan before you need it. Do a loaded overnight hike on your planned route. You'll discover what gear is unnecessary, what's missing, and whether your fitness level matches your plan. Most people are surprised by how much harder a loaded pack makes hiking, especially over varied terrain.
Most emergency management experts recommend keeping your bug out destination within 100 miles — ideally much less. Beyond 100 miles on foot becomes a multi-week journey that few people can realistically complete, especially with children or elderly family members. The best bug out plans involve getting to a pre-arranged location (family farm, friend's rural property, or a well-stocked off-grid location) that is close enough to reach in 3–5 days on foot if vehicles are unavailable. A 25–50 mile destination is much more realistic than a 200-mile one.
For a fit adult, aim for no more than 25–30% of body weight. A 175 lb person should target 35–52 lbs maximum, but lighter is always better — elite military units target 35 lbs total for sustained movement. For average fitness, target 20% of body weight. Everything above these thresholds increases injury risk, slows pace, and burns more calories. Ruthlessly cut anything that isn't essential. The most common mistake is packing too much "nice to have" gear at the expense of mobility.
Yes. Each capable adult should carry their own bag. Children 8–12 can carry a small daypack with their personal items (water bottle, snacks, comfort item, change of clothes) — typically 5–10% of their body weight. Younger children will need their supplies distributed among adults. If you have elderly or mobility-limited family members, plan their kit weight carefully and consider pre-positioning supplies in a vehicle rather than expecting them to carry a full pack. Each bag should contain at least one complete set of critical survival items in case the group gets separated.
A bug out bag (BOB) is designed to take you from your home to your bug out location, typically over multiple days. A get home bag (GHB) is a smaller, lighter kit kept in your vehicle or workplace, designed to get you from wherever you are back to your home in an emergency — typically 1–2 days of travel. A GHB might weigh 10–15 lbs versus a BOB's 25–45 lbs. Most preparedness experts recommend having both: the GHB gets you home, the BOB takes you out if home becomes unsafe.
Review your bug out bag every 6 months. Check food and water expiration dates, replace batteries, update medications, and ensure clothing fits current family members. Also update your maps and route plan if any roads, bridges, or key infrastructure in your area has changed. At least once a year, do a full "load out" — put on the pack and walk several miles to verify the weight is manageable and nothing chafes or digs in. The bag you've never tested is unreliable.