Water Storage

Calculate storage needs, rainwater harvest, and purification requirements.

Calculators

Cistern Size

How much storage for my household?

Rainwater Collection

Annual harvest from roof area

Water Purification

Bleach or iodine amounts

Minimum

1gal

per person/day

Recommended

3gal

per person/day

Emergency

14days

minimum supply

Planning storage?

Family of 4, 2-week supply, 3 gal/person/day = 168 gallons minimum. Our cistern calculator factors in household size and usage patterns.