Most bug out bag lists will get you killed at mile two. Built around the weight rule military packing uses — real lbs, real priorities, and the heavy junk to leave home.
A bug out bag is what you grab when you have to leave — 72 hours of water, food, shelter, and meds in a pack you can actually carry. Most lists online ignore the 20–25% body weight rule; that's how you end up dead at mile two.
Written by Mike, a union power lineman with 22 years on the job and several mutual aid trips to many states.
FEMA recommends a minimum 72-hour supply of food and water per person in any emergency kit. — Ready.gov — Build a Kit
Prepper Evolution uses a 20% body-weight ceiling (REI pack-weight guide) and warns at 25% on the bug-out bag calculator. Army ATP 3-21.18 finds energy cost climbs past 30%. The 25% line is a warn, not a Ready.gov pack rule. — Prepper Evolution bug-out bag calculator
Most bug out bag lists on the internet are fantasy gear guides written by people who’ve never hiked more than a few miles with a 40-pound pack. They look comprehensive. They’re actually a liability.
A real bug out bag has to be carried by a real person — possibly while stressed, possibly with kids in tow, possibly for miles. That changes what belongs in it.
Here’s what actually goes in a functional bug out bag, built around the rule most military and survival instructors agree on: your loaded pack should weigh no more than 20–25% of your body weight. For a 180-pound person, that’s 36–45 pounds max. For a 130-pound person, it’s 26–32 pounds. That’s less than you think.
You need water more than anything else. Plan to filter from natural sources after your carry supply runs out — you can’t carry enough for more than a day or two.
Skip anything that requires extensive cooking. A compact stove for hot water is fine. A full cook setup is not.
Temperature management is what gets people. An emergency bivy on a cold night is the difference between fine and hypothermic.
Don’t overthink this. Two BICs and a ferro rod covers you. The bow-drill survival skill is great to have but not a replacement for a lighter.
GPS batteries die. Cell towers go down. Paper maps and a compass don’t.
The stop-the-bleed gear matters more than Band-Aids. Serious trauma is the thing that kills people fast — the basic kit handles the slow stuff.
These items show up on most lists. They shouldn’t be in a primary BOB:
Here’s a real, functional 72-hour bag built for a 170-pound adult:
| Category | Weight |
|---|---|
| Pack (empty) | 3.5 lbs |
| Water (2L + filter) | 4.8 lbs |
| Food (3 days) | 5.0 lbs |
| Shelter (bivy + tarp) | 1.5 lbs |
| Fire starting | 0.3 lbs |
| First aid (full) | 2.0 lbs |
| Tools/navigation | 2.2 lbs |
| Comms/electronics | 1.8 lbs |
| Clothing (2 layers) | 3.5 lbs |
| Documents/misc | 0.7 lbs |
| Total | ~25.3 lbs |
That’s 15% body weight. Well within the functional carry limit. And it covers 72+ hours for real.
The calculator tracks all 80+ items across 11 categories, shows you your total weight, calculates it as a percentage of your body weight, and flags when you’re getting into “too heavy” territory. It links out to the actual products we’d buy — with affiliate links that support the site but don’t change the prices.
It saves your list locally so you can come back to it. Export to PDF when you’re ready to shop or print.
A bug out bag (BOB) is a portable emergency kit designed to sustain you for 72 hours while evacuating a disaster zone. Most preppers build around a 25–35lb pack covering water, food, shelter, fire, first aid, and basic communication — the minimum to survive independently for three days without outside help.
Your loaded bug out bag should weigh no more than 20–25% of your body weight. For a 180-pound person, that’s 36–45 lbs maximum. For a 130-pound person, 26–32 lbs. Most people overpack. If you can’t maintain a walking pace for an hour with it on, it’s too heavy — cut until you hit your weight budget.
A bug out bag is built for evacuating from home for 72 hours or more. A get-home bag stays in your car and is built to get you from wherever you are back to your house — typically a lighter 24-hour kit optimized for the distance between work and home. Both serve different scenarios and serious preppers carry both.
Audit your bug out bag every 6 months. Check food and water expiration dates, rotate batteries, update medications, and confirm everything still fits and functions. Spring and fall are natural reminders — do it when you change smoke detector batteries. Replace anything expired, damaged, or that no longer fits your situation.
A standard bug out bag is built for 72 hours (3 days). FEMA recommends a minimum 72-hour supply for emergency kits. For most evacuation scenarios — natural disasters, regional emergencies — 72 hours gets you to a shelter, a family member’s home, or out of the affected area. Extended kits (7–14 days) exist but dramatically increase weight.
If you only have 20 minutes and a backpack, grab these ten. This is the floor. Everything else builds on it. The Core 10 keeps you alive for 72 hours. The full list keeps you functional.
| # | Item | Why it is non-negotiable |
|---|---|---|
| 1 | Water filter (Sawyer Squeeze or similar) | Dehydration hits faster than hunger |
| 2 | 1L water bottle, pre-filled | Immediate hydration while you move |
| 3 | 2,400-calorie emergency ration bar | Calories without cooking, long shelf life |
| 4 | Emergency bivvy or space blanket | Hypothermia is real in three seasons |
| 5 | Lighter plus waterproof matches | Two fire sources minimum |
| 6 | Headlamp with extra batteries | Hands-free light at night |
| 7 | Fixed-blade knife (about 4 inch blade) | Cutting, kindling, food, shelter |
| 8 | First aid kit at IFAK level | Tourniquet, gauze, the meds you actually take |
| 9 | Phone charger / power bank (10,000 mAh+) | Maps, calls, photos of documents |
| 10 | Copies of IDs plus $200 cash in small bills | Prove who you are and buy what is left |
FEMA and the American Red Cross both stress that a kit has to be portable. The practical ceiling I use is 20% of body weight for sustained carry. For a 180 lb person that is 36 lb max. I keep mine around 28 lb loaded: heavier than a day pack, lighter than a ruck. If you cannot jog 100 yards with it on, it is too heavy. The calculator on this site also warns at 25%. REI advises keeping a loaded backpacking pack under about 20% of body weight. U.S. Army research finds energy cost climbs once loads pass 30% (ATP 3-21.18, App. C). The 25% line is a warn, not a sourced limit.
One gallon weighs over 8 lb. You are not carrying three days of water. You carry enough to stay hydrated now, plus a way to make more.
If you only buy one item from this list, buy a filter. Two purification methods. Always.
A 72-hour food target is roughly 6,000-7,000 calories (about 2,000 per day). Ration bars cover the baseline. Energy bars, nuts, and peanut butter packets extend range and morale. Two freeze-dried pouches only if you can boil water. Rotate annually. You are not cooking gourmet meals on the move.
You can get in trouble from exposure in 50-degree rain with wind. I have seen that catch people in the PA mountains in September: sunny at noon, 48 degrees with sideways rain by 6 PM.
Southeast heat: you can drop the bag and run bivvy plus a fleece. Northeast (NJ, PA, New England): keep the sleeping bag. Shelter beats food in the first night.
Three ways to make fire, stored in three places. A lighter in a pocket, matches in the bag, ferro rod clipped outside. Wet hands and wind kill one method. Spread them so losing one pouch does not leave you cold. Cotton balls with petroleum jelly in a zip bag. Esbit tablets for awful conditions.
The Red Cross preparedness checklist is a start. A bag kit has to handle trauma, not just blisters. Customize around cuts, sprains, burns, and the allergies in your house.
Anti-diarrheal does not get mentioned enough. Stress, bad water, unfamiliar food. GI issues dehydrate you faster than a lot of the threats people pack for.
Phone dies. GPS needs signal or downloaded maps. Paper does not. Keep a current road map of your state, a baseplate compass, offline maps, a notepad, and a whistle. Know the secondary routes from work to home. If you have not walked your primary route, you are guessing.
Cell towers go down in major events. I have worked storms where cell was gone for days across whole counties.
A NOAA weather radio still gets alerts when cell and internet are both down. Power bank plus weather radio covers most of this category. Test quarterly.
This is where people overpack. You do not need a tomahawk, a folding saw, and a machete. A proven fixed blade, a multitool, a 300+ lumen headlamp, 10-15 ft of duct tape wrapped on a bottle, zip ties, a mini sewing kit, contractor bags, a square of foil, work gloves. Spend money on the filter, the first aid, and the shelter. A $20 Mora-class blade will baton kindling, prep food, cut cordage, and scrape a ferro rod.
FEMA emergency-preparedness guidance stresses documents because without them, proving who you are (insurance, shelter access, prescription refills) turns into a second disaster. The Red Cross kit lists go the same way: IDs and cash travel with the bag.
$200 cash in small bills and printed IDs solve more post-disaster problems than most of the gear in the pack.
One full change plus the extras that keep you moving: moisture-wicking base layer, fleece, packable rain jacket, two pairs of merino socks, one extra underwear, bandana, season-right hat. Footwear is on your feet, broken in, not in the bag. Extra socks are the most underrated line on this list. Wet, cold, and tired you can still walk. Once the feet go, you are done.
A get home bag is a different mission. The BOB gets you from home to safety over 72 hours. A GHB gets you to home from work, school, or a commute, usually in under 24 hours.
| Feature | Bug Out Bag | Get Home Bag |
|---|---|---|
| Duration | 72 hours | 8-24 hours |
| Weight | 25-35 lb | 10-18 lb |
| Location | At home, ready to grab | In the vehicle or at the desk |
| Food | 6,000+ calories | 2,000-3,000 calories |
| Shelter | Tarp, bivvy, sleeping system | Emergency blanket only |
| Water | Filter + tablets + bottle | 1L bottle + tablets |
| Clothing | Full change + rain gear | Walking shoes + socks + jacket |
My GHB stays in the truck. About 14 lb. Walking shoes (work boots are not 15 miles of pavement), two bottles, energy bars, rain jacket, headlamp, battery bank, cash. I know the route, including secondary roads and footpaths. Under 10 miles of commute, slim it. Over 20 miles, add water and food and a small first aid kit. It lives in the vehicle or at work, not in the closet next to the BOB.
A single-person list does not scale to five people without a split. My house is me, my wife, and three kids (14, 12, and 9).
Family add-ons: kids' meds and allergy meds, one small comfort item for the younger ones, extra snacks, FRS radios on a family channel, laminated cards with meeting points and each kid's info, footwear sized every 6 months. Kids will carry their own stuff if you train them. My oldest has packed his own camping bag since he was 11. Use the bug out bag calculator to split weight by body weight instead of guessing.
The bag is about 30% of the equation. Skills and planning are the rest. Build and weigh the list in the BOB calculator.