Water Usage & Refill Calculator
Plan your emergency water supply with precision using our comprehensive water usage calculator. Whether you're preparing for natural disasters, RV trips, or camping adventures, calculate exactly how much water you need and how many containers to store it safely.
Why Water Storage Planning Matters
Emergency preparedness experts recommend storing at least one gallon of water per person per day. However, your actual needs may vary based on climate, physical activity, age, and health conditions. Our calculator helps you plan beyond basic survival needs to ensure comfort and safety during emergencies.
Proper water storage planning can mean the difference between discomfort and safety during natural disasters, power outages, or water system failures that affect millions of Americans each year.
Calculate Your Water Needs
Include all family members and pets
FEMA recommends minimum 3 days
1 gal minimum, 3+ gal recommended
Common sizes: 5, 7, or 55 gallons
Extra water for unexpected needs
Your Water Storage Plan
Water Requirements
Storage Solution
Complete Guide to Emergency Water Storage
Water Storage Best Practices
- • Store water in food-grade containers away from toxic materials
- • Replace stored water every 6 months for best quality
- • Keep containers in cool, dark places to prevent algae growth
- • Label containers with storage date and rotation schedule
- • Have multiple storage locations in case of damage
Daily Water Usage Breakdown
- Drinking water: 0.5-1 gallon/day
- Cooking & food prep: 0.5 gallon/day
- Basic hygiene: 1-2 gallons/day
- Dishwashing: 0.5 gallon/day
- Total recommended: 3+ gallons/day
Water Container Options
5-Gallon Jugs
Perfect for families, easy to handle and store. Stackable and portable.
- • Manageable weight when full (42 lbs)
- • Easy to rotate and clean
- • Widely available and affordable
55-Gallon Drums
Ideal for long-term storage, excellent value per gallon stored.
- • Cost-effective for large storage needs
- • Requires pump for easy access
- • Takes up minimal floor space
Water Bricks
Stackable 3.5-gallon containers that maximize storage efficiency.
- • Modular stacking system
- • Built-in handles for portability
- • Space-efficient rectangular shape
Frequently Asked Questions
How much water should I store per person?
The minimum recommendation is 1 gallon per person per day, but 3+ gallons is more realistic for comfort. This includes drinking water, cooking, and basic hygiene needs. In hot climates or for active individuals, you may need up to 5 gallons per day.
How long can I safely store water?
Properly stored water can last indefinitely, but for best quality, rotate your supply every 6 months. Store in food-grade containers, away from sunlight and chemicals. Add a few drops of unscented bleach per gallon if you're concerned about purification.
What's the best container size for families?
5-7 gallon containers offer the best balance of portability and storage efficiency for most families. They're manageable when full, easy to clean, and allow for good rotation practices. Larger drums are great for bulk storage but require pumps for convenient access.
Should I include pets in my water calculations?
Yes! Dogs need approximately 1 ounce of water per pound of body weight daily, while cats need about 3.5-4.5 ounces per 5 pounds of body weight. Add these requirements to your total when using our calculator.
Pro Tips for Water Storage Success
Start Small
Begin with a 3-day supply, then gradually build up to 2+ weeks of storage.
Set Reminders
Use calendar alerts to remind you when to rotate your water supply every 6 months.
Multiple Locations
Store water in different areas of your home in case one area becomes inaccessible.