One gallon per person per day
WATER // SOURCE • STORAGE • TREATMENT
Water reserve calculator
Estimate a household storage target from the federal baseline of one gallon per person per day for drinking and sanitation.
%
For heat, illness, pets and uncertaintyGAL
Includes 20% additional margin
Water only; containers add weight
Rounded up to whole containers
Plan the structure, not just the number. Water is heavy. Spread loads appropriately, rotate stored water, protect it from contamination and keep treatment capability. Hot climates, pregnancy, illness and pets can increase needs.
Planning baseline: Ready.gov water guidance ↗
CALCULATOR → CAPABILITY
Put the numbers into a build order.
Use the household planner to turn water, food, power and mobility targets into a practical 7-, 30- and 90-day roadmap. A private assessment goes further by validating how all ten systems interact on the actual property.