Water Storage Calculator

Calculate exactly how much water your family needs to store for emergencies. Account for climate, activity level, and pets.

Frequently Asked Questions

How much water should I store per person per day?

The general recommendation from FEMA and the Red Cross is one gallon per person per day. This covers both drinking and basic sanitation needs. In hot climates or for physically active individuals, you should plan for 50% more. A two-week supply is the minimum recommended target for most households.

How long can stored water last?

Commercially bottled water can be stored indefinitely if kept sealed and stored properly. Tap water stored in clean, food-grade containers should be rotated every 6 to 12 months. Adding a small amount of unscented liquid chlorine bleach (1/8 teaspoon per gallon) can help preserve tap water for longer periods.

What are the best containers for storing water?

Food-grade polyethylene containers (marked with a #2 HDPE symbol) are the safest choice. Blue water storage barrels (55-gallon) are popular for long-term storage. Avoid containers that previously held non-food substances. Glass works but is heavy and breakable. Never use milk jugs as they are difficult to clean thoroughly and degrade over time.

Should I store water or invest in purification?

Both. Stored water provides an immediate supply during the first hours and days of an emergency when you may not have access to a water source. Purification methods like filters, UV treatment, and chemical tablets are essential for sustained needs beyond your stored supply. Think of stored water as your first line of defense and purification as your long-term strategy.

How do I store water if I live in a small apartment?

Focus on stackable containers like WaterBricks (3.5 gallons each) that can fit under beds or in closets. Use vertical space by stacking cases of commercial water bottles. A few 5-gallon jugs in a closet can provide a week of drinking water for one person. Consider a bathtub water storage bladder (WaterBOB) that can hold 100 gallons when filled during an approaching emergency.