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How many gallons for one person at home

By BorderNest · 2026-11-01 · Updated 2026-11-03

Ready.gov prints one gallon per person per day, so a single 7 gallon jug covers one person for about a week and is a short start for a family.

Why one gallon per person per day

Ready.gov prints one gallon per person per day, and that number covers both drinking and basic washing. It is a planning number, not a marketing number, which is why it has stayed the same for years. For one person over seven days, that works out to about 7 gallons, which is exactly one full Reliance Aqua-Tainer. For three people, the same single jug buys you roughly two days, which is a useful gut check before you decide you are stocked.

A family aiming for two weeks needs several jugs, not one. The second jug is not a backup, it is the next seven days of water sitting on the counter waiting for you. Once the first jug is filled, dated, and tucked into storage, the second one becomes the obvious next purchase.

What counts on top of that gallon

Pets drink on top of the per person number, so a dog or cat adds its own daily need to your math. A filter sitting in a kitchen drawer is not stored water, it is a treatment tool, and treatment tools only help if you have water to run through them. Four people planning together should jump to the family sized guide, since the math and the storage footprint both change.

Do this today

Fill one jug with tap water, write today's date on the side with a marker, and set it somewhere cool and dark. That single act moves you from "planning to store water" to "storing water," and the rest of the math gets easier from there.

Before you order, check today's price on Amazon for the jug below.

For the full picture, open the next guide, Start with water, before you buy anything clever, and see the water we would buy first in the water shop.

See the water we would buy first

As an Amazon Associate, BorderNest earns from qualifying purchases. Preparedness guidance here is not medical, legal, or emergency-service advice.

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See the rest of the water

More water

The other writeups in this room. The one marked start here is the overview.

Start here Start with water, before you buy anything clever Your tap can quit without warning. A full jug in the corner beats a filter still in your cart. Water How to treat water you scooped from outside A creek, a pond, or a rain barrel can all be made safer with the right order. You will learn settle, filter, then treat, and why the home jug still matters most. Water Water for a family of four, counted in days Four people need about four gallons a day, so a single seven gallon jug covers under two days. The lesson is to count days, not bottles, and start with one dated jug on the floor. Water How to store water without giving up the closet One jug on the floor, a date on the side, and a corner that does not bake in July. You learn the minimum that actually counts and the spot in a small apartment that keeps water drinkable. Water Where a water jug fits in a small apartment A full jug belongs on the floor, spigot facing out, in a corner that stays cool. Water Grocery store bottles or one jug you refill A case of bottles you already bought counts as stored water. A refill jug is easier to pour from at home, and owning both is a fine plan. Water How to date the jug so you actually rotate it A marker on the jug outlasts a phone reminder. So you actually rotate the water instead of guessing. Water Keep the water jug out of a hot garage A garage that bakes in July or freezes in January is a fine place for a shovel and a bad place for drinking water. The lesson is how heat and plastic quietly shorten the life of stored water. Water Containers that should not hold drinking water A kitchen counter, a row of empty jugs, and the quiet rule that only drinking-water containers store drinking water. Students learn which plastics to skip and why a clean-looking bottle can still ruin a supply. Water Extra water for a pet, on top of the people Ready.gov lists pet water on its own line, so add what the animal already drinks on top of the people gallon. The trick is to store water you would actually let them drink on a normal Tuesday. Water Water for a baby or an older adult at home Formula and a person who cannot lift a full jug change the setup. The gallon is still where you start. This is not feeding or medicine advice. Water A weekend of stored water before any filter A weekend plan to put real water in the house before chasing a filter. The lesson is simple: stored water beats a clever gadget every time. Water Sawyer MINI or LifeStraw: pick the job, then the filter Two small filters, two different jobs. The Sawyer MINI pushes water from a pouch into a bottle; the LifeStraw is the straw you drink through. Pick the one the person using it will actually figure out under stress. Water Tablets for the water you did not store yet A kitchen counter with an empty jug and a bottle of tablets side by side. Students learn that tablets treat water already in a container, so they only cover the gap when stored water runs out or never got filled.

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