How Much Water to Bring Car Camping: A Simple Calculator for Drinking, Cooking and Washing

Many campgrounds have potable water taps, but plenty don't, and dispersed sites never do. Running out of water is one of the fastest ways to end a trip early. This guide shows you how to calculate how much water to bring, what to carry it in, and what to do if you need to treat water at camp.

How this guide was made: Amounts here are planning estimates based on common public-land guidance. Hot weather, hiking, and altitude increase your needs, so always add extra.

The Simple Rule

A common planning number is about 1 gallon per person per day for drinking and basic cooking. In hot or dry places such as the desert, plan on more. For dishes and washing up, add more on top.

Water Calculator

UsePer person, per day
Drinking (mild weather)~0.5–0.75 gal
Drinking (hot weather or hiking)~1 gal or more
Cooking and coffee~0.25 gal
Dishes~0.25 gal
Washing hands, face, teeth~0.25 gal
Total (mild weather)~1.25–1.5 gal
Total (hot weather)~2 gal

Planning estimates. Add a safety reserve of at least one extra day.

Example: 2 People, 3 Days, Mild Weather, No Water at Camp

  • 2 people × 1.5 gal × 3 days = 9 gal
  • Plus one reserve day: 2 × 1.5 = 3 gal
  • Bring about 12 gallons.

Water weighs about 8.3 pounds per gallon, so 12 gallons is roughly 100 pounds. That's easy in a car but worth knowing when you load up.

What to Carry It In

ContainerProsCons
Store-bought 1-gallon jugsCheap, easy to find, refreezable as iceFlimsy; create plastic waste
5–7 gallon jug with spigotEasy hand-washing and dishes; refillableHeavy when full (40–55 lb)
Collapsible water carrierPacks flat when emptyLess durable; can tip

Tip: Freeze a few 1-gallon jugs before the trip. They work as long-lasting ice in your cooler and become drinking water as they melt. See our cooler comparison for packing tips.

What I actually bring: a Costco case of 30 half-liter (500 ml) bottles, used a little at a time through the trip. It's the simplest system there is: no jugs to clean, nothing to fill, and the bottles stay sealed until you open them.

How far does one case go? 30 × 0.5 L = 15 liters, or about 4 gallons. Using the 1-gallon-per-person-per-day rule above, that's roughly two people for two days with no tap at camp. With a campground tap for dishes and washing, the same case stretches much further, since you're only drinking from it.

The honest trade-offs: small bottles are less efficient for cooking and dishes, they make more plastic waste to pack out, and a case takes up a surprising amount of floor space. For longer or remote trips, adding one refillable jug for cooking and washing keeps the bottles for drinking.

Check Before You Go: Is There Water at Camp?

  • Read the campground page for "potable water" or "drinking water." Seasonal campgrounds often shut water off in fall and winter.
  • Dispersed camping means no water at all. Bring everything. See our dispersed camping guide.
  • Call the ranger station if the website isn't clear.

Treating Water From Streams and Lakes

Water from natural sources can carry bacteria and parasites even when it looks clean. If you need to use it, treat it first. The CDC describes these common methods:

  • Boiling: bring water to a rolling boil for 1 minute (3 minutes at elevations above 6,500 feet). The most reliable method.
  • Filters: remove bacteria and parasites; check the product's rating. Many don't remove viruses.
  • Chemical treatment: follow the product's directions and wait times.

Collect water away from campsites and trails, and don't wash dishes or yourself directly in streams or lakes.

Save Water at Camp

  • Wipe pans with a paper towel before washing.
  • Use a spray bottle for rinsing dishes.
  • Plan one-pot meals. Our 3-day meal plan keeps dishes to a minimum.

FAQ

How much water do I need per day camping?

Plan on about 1 gallon per person per day for drinking and cooking, more in hot weather, and extra for washing.

Can I drink water from a campground spigot?

Usually, if it's marked as potable or drinking water. Look for posted notices; some campgrounds issue boil-water advisories.

How do I keep water cold while camping?

Freeze some water jugs before the trip and store them in your cooler. Keep spare water in the shade.

Sources

  • CDC – making water safe in an emergency (boiling and treatment)
  • National Park Service – desert hiking and water guidance
  • U.S. Geological Survey – weight of water

Last updated: October 2026 · Overland Route Lab

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