Emergency Sanitation Calculator
When sewage and running water are unavailable, sanitation becomes critical. Calculate exactly how many waste bags, toilet paper rolls, sanitizer bottles, and other supplies your household needs.
Calculate your sanitation supplies
Enter your household size and emergency duration to get supply counts for the most critical sanitation items.
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Adjust inputs above and hit Calculate.
How to use this calculator
Enter your household size and how long you want to prepare for. Select your planned toilet solution, waste bags and a bucket is the most common home option. The calculator outputs the key consumables: waste bags, toilet paper, hand sanitizer, soap, and disinfectant wipes. Use this as a shopping checklist and review the full supply breakdown for details.
Building a bucket toilet kit
- 5-gallon bucket: Hardware store, ~$5. Line with a heavy-duty contractor bag before use.
- Toilet seat lid: Snaps onto a 5-gallon bucket, ~$10–15. Makes use far more comfortable.
- WAG bags or enzyme powder: Each use after a solid adds a scoop of cat litter or enzyme, WAG bags contain both in a pre-packaged pouch, ~$3–5/bag.
- Trash bags (heavy duty 3 mil): Line the bucket for each day's use and tie off at the end of the day. Store tied bags in a separate covered bin away from living areas.
- Ventilation: Use the bucket toilet in a well-ventilated area or outside if possible. Odors build quickly in enclosed spaces.
Tips for success
- A 5-gallon bucket with a toilet seat lid adapter and heavy-duty waste bags is the most reliable emergency toilet, available at hardware stores for under $30 total.
- Use cat litter, sawdust, or commercial WAG bags with enzyme powder to neutralize odors and solidify liquid waste after each use.
- Hand hygiene is critical when sewage systems fail, disease spreads rapidly when sanitation breaks down. Prioritize hand sanitizer (at least 60% alcohol) and soap.
- Store toilet paper in sealed plastic bins or Ziploc bags, it absorbs moisture quickly and becomes useless if wet.
- Feminine hygiene products, diapers, and wet wipes should be added separately based on your household needs, they're not included in this baseline estimate.
Practical note
FAQ
Can I use my toilet if the water is out but sewage is still working?
Sometimes, if your sewer line is gravity-fed (most suburban homes) and there's no structural damage to pipes, you can manually flush with a bucket of water poured directly into the bowl (not the tank). Pour about 1.5 gallons quickly to trigger the siphon. Check with your utility first during extended outages, as they may advise against flushing to protect the system.
How do I dispose of waste bags after an emergency?
Sealed waste bags go in regular trash once municipal service resumes. Do not bury them, household plastic bags are not designed for burial and can contaminate groundwater. WAG bags with enzyme treatment are technically landfill-safe. Never dump raw waste into storm drains, yards, or natural waterways.
What if I have a septic tank, can I still flush during a power outage?
If you have a gravity-fed septic system (no pump), yes, you may be able to flush manually with buckets of water. If your septic uses a pump or lift station, a power outage will disable it and you'll need an alternative. Know your system type before an emergency occurs.
How much hand sanitizer is enough?
FEMA and CDC recommend at least 60% alcohol hand sanitizer. A 2 oz bottle (~60 ml) contains roughly 40–50 uses. For a family of 4 washing hands 6 times per day, you'll use about 24 applications per day, so a 2 oz bottle lasts roughly 2 days. Plan on a 12–16 oz bottle per person per week, or supplement with soap and minimal water for handwashing.
Should I store bleach for sanitation?
Yes, unscented household bleach (5.25%–8.25% sodium hypochlorite) is one of the most effective and inexpensive disinfectants for emergency sanitation. Use a diluted solution (1 tablespoon per gallon of water) to disinfect surfaces, toilet buckets, and spills. Bleach degrades over time, rotate annually and check that the solution still smells like chlorine before use.