How Long Will 180 Litres of Water Last Two People Free Camping?

One of the most common questions from free campers: "How long will our water last?" If you're carrying 180 litres and there are two of you, the answer depends entirely on how you use it.

Let's break it down with real numbers.

Average Water Usage Per Person Per Day

Here's what typical daily water use looks like when you're being mindful but not rationing:

For two people, that's roughly 52-74 litres per day with daily showers and normal dish washing.

So How Long Does 180 Litres Last?

Normal Use (daily showers + dishes)

At 52-74L per day for two people:

• Conservative estimate: 180 / 74 = 2.4 days
• Careful use: 180 / 52 = 3.5 days

Realistically, most couples report getting 2-3 days from 180 litres when showering and washing dishes daily.

Water-Wise Use (shorter showers + careful dishes)

If you cut showers to 3 minutes and use a wash basin for dishes:

For two people: 36-46 litres per day

• 180 / 46 = 3.9 days
• 180 / 36 = 5 days

With discipline, you can stretch 180 litres to 4-5 days for two people.

The Biggest Water Users (and How to Cut Them)

Showers — The #1 Water Drain

A standard caravan showerhead flows at about 9 litres per minute. A 5-minute shower uses 45 litres. That's a quarter of your tank for one shower.

How to cut it down:

• Fit a low-flow showerhead — drops flow to 4-6L/min, saving 15-25L per shower
• Navy shower method — wet yourself (30 sec), turn off, soap up, rinse (1-2 min). Uses just 8-12 litres
• Shower every second day — a damp cloth wash on off-days saves 15-20L per person
• Shower together — not just romantic, it's practical. You share the warm-up water

Dishes — The Hidden Water Waster

Running water while washing dishes can use 10-15 litres easily. The fix is simple:

• Use two basins — one for washing, one for rinsing. Uses about 4-6L total
• Wipe plates first — a paper towel or scraper removes food scraps before water touches them
• One-pot meals — fewer dishes, less water. Curries, stews, and stir-fries are your friend
• Reuse water — rinse water from dishes can go on plants or be used for a first wash on the next lot

Practical Tips to Stretch Your Water

Before You Leave

• Fill your tank completely — sounds obvious, but check it's actually full
• Carry extra water — a 20L jerry can is cheap insurance and gives you an extra half-day
• Know your tank size — not every "180L tank" holds exactly 180 litres after plumbing dead spots

While Free Camping

• Track your usage — check your tank gauge morning and night so you know your daily rate
• Catch grey water — if regulations allow, reuse shower water for flushing or cleaning
• Boil what you need — don't fill the kettle to the top if you only want one cup
• Use hand sanitiser — saves a surprising amount of water over a few days
• Cook with less water — steam vegetables instead of boiling, use the pasta water for sauce

Water Saving Upgrades

• Low-flow showerhead ($20-$50) — the single best investment for water savings
• Foot pump shower — gives you precise control over water flow
• Tap aerators — reduce flow at the kitchen tap without losing pressure
• Water tank gauge — an accurate gauge takes the guesswork out of how much you have left

Quick Reference: How Long Will 180L Last Two People?

Planning Your Free Camping Stops

If you know your water lasts 3 days, plan your route around water refill points. Most free camps don't have water, but many towns have:

• Free water taps at rest areas, parks, and visitor centres
• Dump points that often have potable water taps nearby
• Service stations — most will let you fill up if you ask nicely
• Showgrounds and recreation reserves — often have taps available

Plan to refill before you hit empty. Running out of water 50km from the nearest town is no fun.

The Bottom Line

For two people with daily showers and normal dish washing, 180 litres will last about 2-3 days. With a low-flow showerhead, shorter showers, and basin washing for dishes, you can push that to 4-5 days.

The biggest wins come from your showerhead (fit a low-flow one) and your dishes (use basins instead of running water). Those two changes alone can nearly double your water life.

If you're planning a week of free camping, either carry extra water or plan a refill stop around day 3.

Related Guides

• Free Camping in Australia: A Beginner's Guide
• Caravan Water Pump Not Working? Here's What to Check
• Caravan Mains Water Not Working? How to Find and Fix the Problem

Useful Resources

• NSW National Parks and Wildlife Service
• Parks Victoria — Camping
• Department of Biodiversity, Conservation and Attractions WA

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KamperHub Team

Helping travellers tow safely and confidently. KamperHub provides tools for trip planning, weight compliance, and adventure management.