Last Updated: May 3, 2021

Best Composting Toilet in 2021

Composting toilets are a fantastic way to reduce your carbon footprint. They use way less water than mainstream toilets (and some don’t use any at all!), and some models even separate liquid and solid waste so that you can produce your own ‘humanure’ for your garden.


At A Glance: Our Top 3 Composting Toilets


There’s a huge variety of compost toilets currently on the market, with some designed to be small and portable, making them great for RV trips or houseboats, and others coming as permanent systems that can be installed into regular houses (with the right plumbing).

Although they do require some care and attention, using a composting toilet is one way you can be sure to give something back to mother earth, day in and day out. Since there’s so much variety out there, we’ve hunted high and low to bring you a selection of the best composting toilets around. We’ve included a range of styles and sizes so that you can be sure to find the one that’s right for you – enjoy!

Top Product Overview

Nature's Head Self Contained Composting Toilet with Close Quarters Spider Handle Design
  • Extremely large solid capacity
  • Separate liquids and solids bin
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Villa 9215 AC/DC
  • Extremely large solid capacity
  • Separate liquids and solids
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Porta Potti 92306 White Thetford Corp
  • Rotating pour-out spout prevents backsplashes during emptying
  • Optional ground-fixing mechanism for bumpy rides
SEE ON AMAZON →
STANSPORT Portable Camp Toilet 14 x 14 x 14 in, Green
  • Lightweight and great for weekends away
  • Very affordable
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VIVOHOME 5.3 Gallon Waste Tank Portable Indoor Outdoor Toilet Compact Double-outlet Commode with Anti-leak Seal Ring and Cleaning Brush for Travel Camping RV Boating Fishing
  • Lightweight and packs down in dual parts for portability
  • Great holding capacity for a portable option
SEE ON AMAZON →
SUN-MAR GTG TOILET | Portable Toilet, Compost Toilet for RV
Best for small spaces
  • Separates liquids and solids
  • Waterless design
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Camco 41541 Portable Travel Toilet-Designed for Camping, RV, Boating and Other Recreational Activities - 5.3 Gallon , White
  • Electricity-free, lightweight design
  • Separates liquids and fluids
SEE ON AMAZON →
Nature's Head Dry Composting Toilet with Standard Crank Handle
  • Extremely large solid capacity
  • Separate liquids and solids bin
SEE ON AMAZON →
PLAYBERG Portable Indoor & Outdoor Travel Toilet for Camping and Hiking Indore 8 Gallon Waste Tank, Grey, 17' W x 16' D x 14' H (QI003241NEW)
  • Extremely portable
  • Integrated toilet paper handle
SEE ON AMAZON →

Best Composting Toilets


Top Pick

Nature's Head Composting Toilet With Spider Crank

Nature's Head Self Contained Composting Toilet with Close Quarters Spider Handle Design

We’re kicking off our list of the best composting toilets around Nature’s Head Composting Toilet With Spider Crank. This impressive toilet is one of the most popular composting toilets around, and it’s easy to see why.

Not only does this Nature’s Head composting toilet operate via a zero-water mechanism – simply crank the handle to mix your waste – it also separates liquid and solid waste. By funneling away liquids, bad odors are reduced plus this composting toilet features an exhaust fan that runs off 12V power to make sure no pesky smells linger.

This toilet is a popular choice for areas with limited space thanks to the small spider handle design. But don’t let the small size fool you – this toilet has one of the best solid capacities around (60-80 uses – although you need to empty the liquids more frequently).

This high-end Nature’s Head composting toilet certainly isn’t the cheapest compost toilet around… but it’s constructed of durable materials (and has a 300lb weight capacity) PLUS it comes with a 5-year warranty included so if you do take the plunge, you can rest assured that your investment will last you a while.

Pros

  • Extremely large solid capacity
  • Separate liquids and solids bin
  • Composting actually occurs inside toilet
  • Waterless design
  • Fan to remove odors
  • Space-saving crank handle
  • 5-year warranty included

Cons

  • Very expensive
  • Not portable

Product Information

  • Dimensions: 22 x 20.5 x 21.7 inches
  • Weight: 28 pounds
  • Installation method: Floor mounted
  • Weight capacity: 300 lbs
  • Voltage: 12V
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Separett Villa 9215 Composting Toilet

Villa 9215 AC/DC

Next up is the Separett Villa 9215 Composting Toilet, another one of our favorites.

This composting toilet separates solid and liquid waste, with solids collected inside a removable bucket lined with compostable bags for ease of handling – it even comes with 10 bags these included. On top of that, it features a vent fan that dries the solids and simultaneously removes bad odors, meaning that this toilet makes dealing with waste about as good as it gets.

It does require a bit of handiwork to get this wall-mounted toilet up and running – you’ll need to organize the vent hose and urine pipe  – but don’t worry it comes with everything you need for installation (including the Allen keys!). Again, this toilet features a waterless design, saving precious resources, and runs off a minimal 12V.

We love that the capacity of this composting toilet means you’ll only need to empty it once or twice a month even with family-sized groups, and the insect screen is a great touch to keep out any unwanted visitors!

Pros

  • Extremely large solid capacity
  • Separate liquids and solids
  • Super easy to empty (liners included)
  • Waterless design
  • Fan to remove odors

Cons

  • Very expensive
  • Installation requires some DIY (but it's intuitive to set-up!)
  • Not portable

Product Information

  • Material: Upper/lower sections: high impact, high gloss polypropylene
  • Toilet Seat: High gloss polypropylene
  • Inner bucket/cover: Polypropylene
  • Voltage: 12 V
  • Energy consumption: 0.06kWh/24hrs
  • Weight: 34 lbs
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Porta Potti White Thetford Corp

Porta Potti 92306 White Thetford Corp

And now for something different… introducing the Porta Potti White Thetford Corp, the first portable toilet on our list.

Weighing just 12.5 lbs, this self-contained composting toilet is considerably lighter than the wall-mounted models we’ve looked at so far. It also has smaller dimensions and we love that there’s an optional ground-fixing mechanism for any bumpy journeys – perfect for RV or boat trips.

This sleek little composting toilet can hold up to 5.5 gallons of solid and liquid waste (combined) but you don’t worry about urine smells thanks to the odor-proof valve system and included deodorizer.

This toilet does require water for use, and the can hold up to 4 gallons of water for flushing. And we love that there’s a gauge so you know when it’s time to top up. Just bear in mind that the flushing mechanism runs off 6xAA batteries… so make sure you get hold of some rechargeable ones if you’re trying to stay eco-friendly.

Once full, the non-electric toilet can be emptied into compost heaps, and the rotating pour-out spout means that you don’t have to worry about any backsplashes – phew! Oh, and there’s even a nifty toilet-paper holder at the base.

Overall, if you want something cheaper than a wall-mounted option but sturdier and featuring some extra touches missing from budget portable options, then this toilet is a great shout.

Pros

  • Rotating pour-out spout prevents backsplashes during emptying
  • Optional ground-fixing mechanism for bumpy rides
  • Odorless design
  • Flush to keep things clean
  • Integrated toilet paper holder saves space

Cons

  • Flush requires water and batteries
  • Doesn't separate liquids and solids
  • Composting must occur elsewhere

Product Information

  • Weight: 12.5 lbs
  • Dimensions: 18.39 x 15.75 x 17.83 inches
  • Installation type: Floor mounted
  • Power source: 6 x AA batteries
  • Installation type: Portable or ground locked
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STANSPORT Portable Toilet

STANSPORT Portable Camp Toilet 14 x 14 x 14 in, Green

Although the STANSPORT Portable Toilet wasn’t designed specifically as a compost toilet, it doesn’t mean it can’t help you with your waste management.

Perhaps you’re camping at an eco-friendly campsite with compost toilets located on the other side of the field? You probably don’t want to walk over there in the dead of night, do you? Especially if you have kids with you!

Just leave this little non-electric toilet close to camp, and you won’t have to make those nighttime journeys anymore.  The lid helps to keep most of the odor at bay, but we recommend grabbing some Stansport bags to help you keep that odor under control. When the solids bin is full, you can simply pop the waste in with the toilet waste on the other side of camp – sorted! And carrying will be a dream to thanks to the in-built handles.

Despite its small size and affordable price tag, this is one study, self-contained composting toilet with a maximum weight of 350 lbs – not bad eh. On top of that, the toilet seat itself is super comfortable too.

Obviously, this isn’t a longer-term solution to waste disposal needs, but it’s certainly worth having one of these in your arsenal so you never get caught unawares!

Pros

  • Lightweight and great for weekends away
  • Very affordable
  • Doesn't require water or electricity
  • Very comfortable seat
  • Large weight capacity despite small size

Cons

  • Doesn't separate liquids and solids
  • Composting must occur elsewhere
  • Waste bags must be purchased separately

Product Information

  • Dimensions: 14 x 14 x 14 inches
  • Weight: 9.2 lbs
  • Weight capacity: 350 lbs
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VIVOHOME Waste Tank

VIVOHOME 5.3 Gallon Waste Tank Portable Indoor Outdoor Toilet Compact Double-outlet Commode with Anti-leak Seal Ring and Cleaning Brush for Travel Camping RV Boating Fishing

If you like the sound of a portable toilet you can use to top-up a waste compost heap such as the STANSPORT Portable Toilet, but you’re after something with a larger capacity, then we’d definitely recommend the VIVOHOME Waste Tank.

With its 5.3-gallon storage capacity, you won’t find yourself emptying this solids bin/tank every day. And, unlike basic portable options, it features a flush and a 2.5-gallon freshwater holding capacity too. Furthermore, the dual-pipe system means that your flushes will be super effective, so you can say goodbye to stains!

With a super-tight seal and ergonomic handles, you won’t have any trouble pouring away your waste. And we also like that the lower and upper sections can be packed away separately for ease of transport and storage. Again, this toilet doesn’t actually compost your waste, but it’s a great temporary holding place for it while you’re away on boating, camping, or RV trip… and this composting toilet has some luxurious touches yet lacks a ridiculous price tag, winning.

Pros

  • Lightweight and packs down in dual parts for portability
  • Great holding capacity for a portable option
  • Dual pipes for efficient flushes
  • Tight seal and ergonomic handle

Cons

  • Doesn't separate liquids and solids
  • Composting must occur elsewhere

Product Information

  • Material: Polyethylene
  • Over dimension: 16 x 14 x 16 inches
  • Weight: 11.77 lbs
  • Weight Capacity: 286 lbs
  • Waste tank: 5.3 Gallon
  • Fresh water tank: 2.5 Gallon
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Best for small spaces

Sun Mar GTG Composting Toilet

SUN-MAR GTG TOILET | Portable Toilet, Compost Toilet for RV

We’re returning to the real of wall-mounted compostable toilets now to introduce you to the Sun Mar GTG Composting Toilet. This toilet is more affordable than some of the other wall-mounted options out there, but it certainly doesn’t compromise on quality.

Despite the tiny size of the Sun Mar composting toilet (it’s a fantastic option for scenarios with limited space, such as boats or RVs), this is one durable toilet thanks to its fiberglass construction.

We also love that this toilet separates liquid and solid waste, which is great for compost management. However, it doesn’t feature a crank, so the waste will have to be treated elsewhere.

This Sun Mar compact composting toilet is also incredibly easy to install, and its waterless design is a great way to reduce your environmental impact. The fan at the rear will eliminate odors, and runs off a mere 12V. With a weight of 25 lbs, this isn’t an ultra-portable option, but it is lighter than most other high-end wall-mounted options.

Overall, if space is your top priority, then the Sun Mar is a great composting toilet.

Pros

  • Separates liquids and solids
  • Waterless design
  • Compact design makes it great for small spaces
  • Fan to remove odors
  • Lighter than other, similar models

Cons

  • No crank so waste has to be treated elsewhere
  • Not portable

Product Information

  • Weight: 25 lbs
  • Dimensions: 24 x 15.75 x 19.8 inches
  • Voltage: 12V
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Best Budget

Camco 41541 Portable Toilet

Camco 41541 Portable Travel Toilet-Designed for Camping, RV, Boating and Other Recreational Activities - 5.3 Gallon , White

The Camco 41541 Portable Toilet offers a unique blend of portability and functionality, which is why it’s one of our favorite compost toilets.

Despite weighing just under 11 lbs, this composting toilet is packed full of features that we love. It separates liquid and solid waste and, thanks to the biodegradable Camco TST treatment (purchased separately), it’s possible to partially treat your waste inside the collection tanks before taking it elsewhere. The treatment also helps to reduce odors, which is necessary seeing as the electricity-free design means there is no fan.

As well as holding over 5 gallons of waste, this composting toilet features an entirely separate 2.5-gallon flush tank to reduce smears on the toilet. Plus, a sliding gate valve links the two tanks, providing a secure, watertight seal when not in use.

Lightweight, separates liquids and solids, flushes, and partially treats waste inside, yet comes with a super low price tag… what’s the catch? We’ll let you know when we find out, but until then, this composting toilet ranks highly on our list!

Pros

  • Electricity-free, lightweight design
  • Separates liquids and fluids
  • Partially treats waste inside
  • Watertight seal between waste and water tanks
  • Very affordable

Cons

  • Camco TST treatment must be purchased separately
  • Doesn't fully treat waste inside

Product Information

  • Weight: 10.8 lbs
  • Dimensions: 14 x 16 x 15.5 inches
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Nature's Head Self Contained Composting Toilet

Nature's Head Dry Composting Toilet with Standard Crank Handle

Nature’s Head sure does know what they’re doing when it comes to compostable toilets, and we couldn’t help but mention another one of their products, the Nature’s Head Self Contained Composting Toilet.

In truth, there’s very little difference between this composting toilet (the name says it all, really) and the Nature’s Head Self Contained Composting Toilet, but they’re both so good that we felt bad for only mentioning one of them…

This Nature’s Head composting model was actually the original, and the newer version features a spider handle instead. However, this older version has been tried and tested and features all the same perks, such as sturdy construction, simple emptying, and the fact that it’s an entirely self-contained composting toilet. Olden goldy or young and snazzy? The choice is up to you!

Pros

  • Extremely large solid capacity
  • Separate liquids and solids bin
  • Composting actually occurs inside toilet
  • Waterless design
  • Fan to remove odors
  • 5-year warranty included

Cons

  • Very expensive
  • Not very portable

Product Information

  • Dimensions: 22 x 20.5 x 21.7 inches
  • Weight: 28 pounds
  • Installation method: Floor mounted
  • Weight capacity: 300 lbs
  • Power source: DC
  • Voltage: 12V
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PLAYBERG Portable Toilet

PLAYBERG Portable Indoor & Outdoor Travel Toilet for Camping and Hiking Indore 8 Gallon Waste Tank, Grey, 17' W x 16' D x 14' H (QI003241NEW)

And last but by no means least on our list of the best composting toilets around is the PLAYBERG Portable Toilet.

Sure, this simple composting toilet can’t actually compost your waste for you… but it’s the perfect place to store your waste until you find somewhere to compost it.

We love its sleek design and simple-to-use bucket and handle system. It also features a toilet paper handle on the side, and it has a fold-down lid that means this toilet can double up as a seat when not in use. It’s also super lightweight, so it makes a great companion for camping trips or other adventures that involve a lot of gear.

It might not be the cheapest portable composting toilet out there, but it’s high quality and sleek design are worth those extra dollars.

Pros

  • Extremely portable
  • Integrated toilet paper handle
  • Sleek design

Cons

  • Doesn't separate liquids and solids
  • Composting must occur elsewhere

Product Information

  • Dimensions: 17 x 16 x 14 inches
  • Weight: 5.5 lbs
SEE ON AMAZON

What To Look For In A Composting Toilet

So, there you have it, our list of the top compost-friendly toilets around. Still, struggling to decide which one is right for you? We don’t blame you… as we’ve seen, there are lots of factors to consider. Here are some pointers for what to think about before purchasing your own composting toilet:

Portability

How important this is will depend on where you want your composting toilet. If it’s for your home, then portability isn’t going to be a big factor. However, if you’re after a compost-friendly toilet for boating, RV, or camping trips, then portability is definitely something to think about.

Full composting systems tend to be the heaviest, so if you don’t mind collecting your waste and treating it elsewhere, then systems that separate liquid and solid waste for later treatment might be your best bet – they’ll cut down on weight and size (not to mention the price) and the waste can be treated at the end of your trip.

To flush or not to flush?

As we’re sure you’re aware, the main benefit of compostable toilets is the fact that they’re eco-friendly. Does this mean that you should go all out eco-warrior and forsake a flushing toilet? Well, that’s up to you.

Composting toilets with a flush still use less water than regular toilets, and you’re still cutting down on the resources needed to treat regular toilet waste. If you’re new to the world of composting toilets and want to ease yourself in, then a toilet with a flush could be your best bet – better a composting toilet with a flush than a non-composting toilet, after all.

Composting capacity

Fully composting toilets will separate your liquid and solid waste as well as providing a means to treat them before you have to move them anywhere (such as a crank handle for the holding tank). These tend to be large-capacity toilets and are often permanent features in people’s homes.

Other composting toilets will separate liquid and solid waste, but it will then require moving to a different location for treatment. If you have a compost treatment site at home but are planning on an RV or boat trip, then one of these toilets is a great way to collect your waste while you’re away and make sure that it’s composted when you return.

Finally, portable toilets can be used to aid composting too. Even some of the most basic ones. The main thing is to try and separate your liquid and solid waste – too much liquid prevents efficient composting and can also create a foul smell. One way around this would be to buy two of the basic portable toilets (one for each kind of waste) and then make sure you empty the contents somewhere appropriate when you’re done.

Our Top Three…

And for anyone still struggling to make up their mind which compositing toilet is the one for them, we’ve managed to whittle our list down to our top three.­

Our top pick if you’re on a budget has to be the Camco 41541 Portable Toilet. Despite its low price tag, this composting toilet separates liquid and fluid waste and can even be used to partially treat the collected waste.

On top of that, it features a lightweight, electricity-free design, and its solid construction means you don’t need to worry about leaks or odors. Plus, it even has a flush for that authentic toilet feel… and all of this for a fraction of the price we’d expect – what a winner!

Sale
Camco 41541 Portable Travel Toilet-Designed for Camping, RV, Boating and Other Recreational Activities - 5.3 Gallon , White
4,200 Reviews
Camco 41541 Portable Travel Toilet-Designed for Camping, RV, Boating and Other Recreational Activities - 5.3 Gallon , White
  • 5.3 gallon holding tank is detachable; 2.5 gallon flush tank
  • Sealing slide valve locks in odors and protects against leakage

If you’re after a composting toilet you can squeeze into the smallest of spots, then we definitely recommend the Sun Mar GTG Composting Toilet. This wall-mounted toilet features a minimalistic, waterless design that not only saves space but cuts down on weight too – perfect for RV or boat trips!

The sturdy construction and integrated fan make for one durable and odor-free toilet experience, and the best part is that it’s very reasonably priced too.

SUN-MAR GTG TOILET | Portable Toilet, Compost Toilet for RV
25 Reviews
SUN-MAR GTG TOILET | Portable Toilet, Compost Toilet for RV
  • COMPACT AND PORTABLE - The efficient GTG is the ideal portable toilet for camping or RV toilet use!
  • INSTALLS IN MINUTES - This portable potty for adults (children too) is almost TOO easy to install!

But which composting toilet is our absolute favorite? It just has to be the Nature’s Head Composting Toilet With Spider Crank thanks to its extra-large capacity, liquid and solid separation, AND functionality to fully compost collected waste.

And if that wasn’t enough, it also features a fan to remove odors, a space-saving crank handle, a waterless design, and an included 5-year warranty – what’s not to love?!

Nature's Head Self Contained Composting Toilet with Close Quarters Spider Handle Design
485 Reviews
Nature's Head Self Contained Composting Toilet with Close Quarters Spider Handle Design
  • No one - and I mean no one - will beat my customer service and individual support
  • Easy to install by any reasonably handy person.