Finding The Best Composting Toilet: A Guide

Finding The Best Composting Toilet: A Guide

Compost toilets have recently gained a lot of popularity amongst campers. They work perfectly for people “living off the grid.” Most of these toilet models don’t use electricity or water, but remain comfortable as a toilet you’d use at your home or in “civilization.”

Most compost toilet reviews are made only to confuse the reader with unnecessary details. Fortunately, each of the products we review is from verified sources and is made to assist you in your shopping process. Continue reading to find a composting toilet that effectively turns your waste into soil and helps remove waste throughout your camping trip.

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Why Should You Buy A Composting Toilet

Here are a few reasons why you should invest in a composting toilet.

Energy Conservation

Composting toilets save a lot of energy and water! You don’t have to pay extra for fresh water to assist you in removing waste from the toilet. According to the American Water Works Association Foundation, over 30% of household water is used to flush toilets.

Illustration Of Dry Composting Toilet

We all know the flush-and-forget system: Once the toilet is flushed, we don’t see where the waste is being transferred, and we don’t have to deal with it. Wastewater treatment takes up a lot of energy as the world shouldn’t use completely clean freshwater to flush out our waste.

Less Odor Than A Regular Toilet

Compost toilets produce fewer odors than a regular toilet and smell less offensive when using it. When the liquids and solids are separate, they don’t have a sewage smell that can last for hours.

Inside the solids tank is coconut COIR or peat moss that’s used to reduce the odor from your waste. It smells like dirt and smells similar to walking into your favorite nursery.

Also, there’s a fan that directs air inside the tank, prevents odors from entering the toilet, and keeps the moisture down inside the tank. Buy a compost toilet if you’re serious about keeping your RV’s bathroom a sanitary environment and insect free.

On What To Pay Attention To When Choosing Your Composting Toilet

Let's take a look on the main features you should pay attention on when buying yourself a composting toilet:


The size of your composting toilet is directly correlated to its capacity. Smaller toilets can fit up to 5 people while larger toilets can hold up to 10 gallons of water and hold about 10 people.

Smaller composting units don’t use aerators and heaters, because they risk insects, unwanted liquid accumulation, and tend to require more care than larger units. Most larger units have a compost mixer, aerator fan, and a heater.

Most importantly, you have to measure the size of your bathroom. You have to make sure that your new toilet can fit within your space. To do this, measure the rough-in size of your bathroom.

Make sure that you don’t measure any tile, trim or any extra addition because it will skew the measurement. Go from the toilet, from the center of the drainpipe, and the baseboard of your wall.

You also have to measure the sides of your toilet’s flange bolts to ensure that your toilet’s side measurements fit within the confined space of your RV. By measuring the size of your bathroom, you’ll save money and find a toilet that works inside your room’s dimensions.

Is It Dry?

Having a dry compost toilet is proven to reduce odor by up to 70%. Dry composting toilets uses no water, doesn’t require plumbing, chemicals, nor flushing. Most dry compost toilets are organic and natural; making it easier for users to get rid of their waste without leaving any residue in the toilet.

Dumping the compost depends on how many times you use the toilet daily, how many people are in your residence, and how much toilet paper you discard after using it.

Man Cleaning Composting Toilet

You can remove the solids tank in a composting bin to help fertilize ornamental plants. Expect to dump out your solids once every 3 weeks. For liquids, they can be diluted and placed on the ground or poured into a sewer. The typical dump schedule for liquids is once every 3 days.


You don’t want to waste your money by buying an inexpensive compost toilet. Most of them have a hard time filtering both liquids and solids waste. To avoid this, we suggest that you conduct a trial run on the toilet you’re planning on buying.

When using it, ask yourself these following questions:

  • How long does it take for both liquids/solids waste to reach full capacity?
  • Does it offer an automatic waste removal process? Or do you have to use a crank handle manually?
  • How well is the toilet at removing unwanted odors?

After you’ve successfully answered these questions, you’ll have to determine which compose toilet suits you the best. Find one that fits inside your RV or home and continue to clean it regularly to prevent your solids/liquids from going past its capacity.

Best Composting Toilet

Winner: Nature’s Head Composting Toilet

Starting off our list is the Nature’s Head Composting Toilet. It comes with a hand crank agitator placed outside the base of the toilet. This makes the product very easy to use and speeds up composting. You can buy this on Amazon at a price around $965.

  • 100% Stainless Steel Hardware
  • Waterless Waste Filtration
  • 3 Fan Settings: Low, Medium, High
  • plus
    Prevents Rust Build up
  • plus
    Good for 80 Uses Before Emptying the Compost

Unlike other competing composting toilets, you can utilize toilet paper with the composting mix without issues if needed. For a complete composting experience, you’ll have to throw most of your paper away. This composting toilet has enough capacity to support 6 people for up to 3 years.

Consumers like this device because its easier to clean out their waste. Simply remove the urine bottle and the seat unit. Then place a garbage bag on the top, place the box inside a bag, and shake it gently.

We also like this compost toilet because of its easy assembly. And, it features a vent fan and a pipe to remove odors from the interior. It only takes 50 minutes to set up, and you can toggle the fan’s settings (Low, Med, High) to preserve the quality of the toilet.

Nature's Head Composting Toilet With Spider Handle



Not to mention, this is the most durable composting toilet available. It can resist stains, stand through the test of time, and is versatile enough to be used virtually anywhere. Its stainless steel cover protects it from obtaining rust and gives the toilet a polished appearance.

Despite its small size, the toilet has an elongated comfort-sized seat. The toilet doesn’t use water and has a urine separator (takes two days to remove it). It has enough capacity to run for 80 uses before it must be emptied.

The only flaw is its short 5ft vent hose. While this length is good for short-term trips, it's too short to place the vent on the roof of the RV. We suggest getting an 8ft length hose or higher if the current length continues to cause further problems.

Still, the Nature’s Head Composting Toilet is the best composting toilet for cabins. Not only can it properly filter out the waste in your toilet, but it can be easily attached to an RV and have air removed from its ventilation system. Try it today if you want an organic composting toilet to take with you on your RV adventures.

Runner-Up: Nature’s Head Dry Composting Toilet

Ranked second is the Nature’s Head Dry Composting Toilet. It weighs under 28lbs, making it very lightweight and easy to maneuver around your RV. It’s currently sold on Amazon at a price about $967.

  • 12 Volt Plug
  • 5 ft Hose
  • Hand Crank Agitator
  • plus
    Perfect for hunting, camping, RVs, and more
  • plus
    Toilet Urine Bottle to Reduce Odor

This standalone compost toilet comes with everything you need to start using it right away. For instance, it has a 12v DC power supply for quick installation. Alternatively, it has a 12-volt wall transfer if you’d prefer to place the toilet on a standard 110-120v AC outlet.

Due to its waterless urine separating design, this compost toilet has a great holding compacity. It can handle 60-80 solid uses before needing to be emptied. It has enough space to accommodate 2 people for about 3 weeks in between clean outs.

Nature’s Head Dry Composting Toilet



The Nature’s Head Dry Composting Toilet is waterless and self-contained. It holds about a 2.-3.5 gallons of bulking material for the base of your compost matter. There are no pump outs or holding tanks, making it a great choice for campers that have limited space in their RV.

Additionally, the toilet features a white granite molded design. And it has a stainless steel component which enhances its durability and protects the toilet from attracting bacteria, rust, and other ailments. Buy this toilet if you want a functional composting device for your next camping trip.

It also offers a crank agitator that works with a 12v power plug. Shoppers like this feature because it allows them to use solar energy to power up the composting toilet. Due to its increased power, it can remove waste within 50 seconds.

The toilet is known for getting infested by black flies. The composting chamber flat and the lid are not sealed shut, making it easier for pests such as flies to enter your toilet. Keep your toilet clean by eliminating waste every 4 days to prevent this issue.

Mainly, the Nature’s Head Dry Composting Toilet is the best composting toilet for off grid living. Due to its capacity, two campers can use it for months before needing a replacement. Buy this composting toilet today if your RV needs a cleaner and safe way to remove waste.

Alternative: Sun Mar Excel Composting Toilet

The Excel is a non-electric composting toilet. You don’t have to use water or power to use it, and it’s 100% non-polluting. This is because it has a recessed handle and a variable bio-drum to help process compost. Buy this on Amazon at a price around $1,105.

  • Dimensions: 36 x 36 x 28 inches
  • 100% Non-Polluting
  • Capacity holds up to 7 people
  • plus
    Capacity holds up to 7 people
  • plus
    NSF/ANSI Certified

The Sun Mar Excel Composting Toilet is designed to be a primary toilet. It’s able to hold the waste of 2-3 people (for a month) or a group of people in a camping grounds for a weekend without needing to be dumped.

You only need to provide a drain hole for the toilet if you plan on using it as a compost. With the drain attached, you don’t have to add water to the unit. It even comes with a venting kit to help circulate clean air throughout the toilet’s internal system.

Due to its low-profile, it complements any bathroom you install it in. And it works in rustic cabins and in camping grounds without any water or power lines. Use this composting toilet for boating trips and other outdoor activities.

Sun Mar Excel Composting Toilet



There is a step-up tool attachment that helps users easily access the toilet seat. It can be adjusted to the user’s height by turning the crank handle. Turn the handle counter-clockwise, lock it back into position, and you’ll have a comfortable composted toilet that properly fits your height.

We suggest getting the Sun Mar Excel Composting Toilet if you plan on homesteading or living off the grid. The toilet will give you an advantage because the composting process is 2x faster than the competition and it’s easier to manage the storage waste inside the system.

You’ll want to look out for the toilet’s faulty drain. This occurs when debris falls through the drum of.

As a result, the drawer becomes filled with urine and takes a maximum of 2 hours to clean up fully. We recommend that you don’t add large objects onto your toilet’s drain to keep it working properly.

You can’t go wrong with the Sun Mar Excel Composting Toilet. It has enough capacity to support 5-7 people over a weekend and doesn’t require a septic system to work properly. Thus, this is a good choice if you want a composting toilet that has the functionality to utilize your waste during your outdoor excursions.

The Verdict

We believe that the Nature’s Head Composting Toilet is the winner. Compostable toilets reviews agree with our decision; stating that the toilet is efficient at managing waste and turning it into bio-friendly soil to promote plant growth.

Ultimately, buy this toilet if you want to keep your RV clean and have a reliable tool when out in the woods.

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