Best Composting Toilets 2026: Compare 18 Models

Best Composting Toilets by Use Case

Our picks from the 18 composting and incinerating toilets we sell, based on how and where you will use one. Every figure comes from the product page.

Best Overall and Best for RVs and Vans

Nature's Head Composting Toilet

$1,035

Self-contained and urine-diverting: no water, no plumbing, no black tank
Solids last about a month for two full-time users; empty the 2.2-gallon urine bottle every 2 to 4 days
12V fan draws 1.68 amp-hours a day, easy on an RV or solar battery
21 in tall, 19 in wide, 23 lbs, 5-year warranty

Our most popular all-rounder. It needs no plumbing and works the same in a van, a boat or a cabin.

Best for Small Spaces and Weekend Use

Nature's Head The Weekender

$1,035

Same seat and fan as the full-size model, with a smaller 1.7-gallon urine bottle
Smaller outside: 18 in wide and 16.75 in tall, 19 lbs
Solids chamber holds 30 to 40 uses, about 2 weeks for two full-time users

Pick it when every inch counts and the toilet is not used every day.

Best for Tiny Houses

Separett Tiny

$999

Urine drains out through a hose, or into a container if you order that version
No bulking material needed; solids go in a compostable bag in a 3.8-gallon container
Runs on 12V or 110 to 240V power
17.75 in seat height, 5-year warranty

Feels closest to a normal bathroom in a small footprint. On a tighter budget, the Tiny-Pod ($749) suits 1 to 2 users with two 11.5-gallon bins.

Best for Full-Time Cabins and Families

Sun-Mar Excel

$2,199

Continuous composting: waste breaks down in a drum, finished compost comes out of a drawer
Rated for 3 adults or a family of 5 full time, 6 adults or a family of 8 seasonally
Needs power: 35W fan plus a thermostat heater, about 150W on average

The highest-capacity self-contained Sun-Mar, emptied every few months rather than every few weeks.

Best With No Electricity

Sun-Mar Excel NE

$1,999

Completely non-electric version of the Excel
Handles up to 5 adults for continuous or seasonal use
Vents through a 4 in pipe

For cabins with no power at all. The Green Toilet Family Package ($1,395) is the other no-electricity choice, with its container under the floor.

Best for Vacation Homes and Rentals

Separett Villa

$989

Looks and sits like a regular toilet; a screen hides the solids bin until you sit
No bulking material, no cranking; urine drains away
Unlimited capacity: empty the solids container as often as your guest count needs
Fan uses 0.06 kWh a day on 12V or 110 to 240V

Guests need no instructions, which is why we recommend it for rentals and vacation homes.

Best for Outhouses

Green Toilet Lux

$1,849

Porcelain toilet above, compost container under the floor
Works indoors or in an outhouse; swap in a spare container when full
120V duct fan for venting

The most household-like seat for an outhouse or a bathroom with space below the floor.

Best on a Budget

Sun-Mar GTG

$639

Urine-diverting with removable liquid and solid chambers, so capacity is unlimited
12V fan with a 110/240V adapter included
18 in seat height

The lowest-priced composting toilet in this collection.

Best for a Whole-House System

Sun-Mar Centrex

from $1,936

Central composting unit sits below the bathroom and pairs with a low-flush toilet
Electric and non-electric (NE) versions
Sized by household: Centrex 1000, 2000 and 3000

For a permanent home that wants a conventional-looking bathroom.

Best Alternative: Incinerating Toilet

ECOJOHN TinyJohn

from $3,095

Burns waste to ash instead of composting it
Handles up to 30 uses a day
Electric (120V or 240V) or propane models

For people who want nothing to compost or empty but ash. Read incinerator vs composting toilets first.

Composting Toilet Comparison Chart

All 18 models side by side. Prices are starting prices; scroll the table sideways on a phone.

Model	Type	Price	Capacity	Power	Best for
Nature's Head	Self-contained, urine-diverting	$1,035	About 1 month of solids for 2 full-time	12V fan	RVs, vans, boats, cabins
Nature's Head Weekender	Self-contained, urine-diverting	$1,035	30-40 uses (about 2 weeks for 2)	12V fan	Tight spaces, weekends
Separett Villa	Urine-diverting, bag system	$989	Unlimited (empty as needed)	12V or 110-240V	Vacation homes, rentals
Separett Tiny	Urine-diverting, bag system	$999	3.8 gal solids container	12V or 110-240V	Tiny houses
Sun-Mar GTG	Urine-diverting	$639	Unlimited (removable chambers)	12V fan	Budget, cabins
RV Pod	Urine-diverting	$999	3.96 gal solids, 1.32 gal liquids	12V or mains	RVs, caravans, boats
Tiny-Pod	Batch	$749	1-2 users	12V or mains	Tiny homes
Oz-e-Pod	Batch	$1,590	1-2 full-time, 2-3 part-time	12V or mains	Cabins
GL 90	Batch	$1,439	2-3 full-time	Electric duct fan	Homes with under-floor space
Green Toilet 100 Easy	Batch	$1,349	1-2 full-time, 3-5 part-time	See product page	Cabins, outhouses
Green Toilet Family Package	Batch, under-floor	$1,395	Expandable with spare containers	None required	Off-grid cabins, outhouses
Green Toilet Lux	Batch, under-floor	$1,849	Expandable with spare containers	120V duct fan	Outhouses, homes
Sun-Mar Excel	Continuous	$2,199	3 adults full-time, 6 seasonal	Electric, ~150W avg	Full-time cabins, families
Sun-Mar Excel NE	Continuous	$1,999	Up to 5 adults	None required	No-power cabins
Sun-Mar Compact	Continuous	$2,060	1 adult or family of 2 full-time, 3 seasonal	Electric, ~125W avg	Smaller bathrooms
Sun-Mar Spacesaver	Continuous	$2,002	1 adult full-time, 3 seasonal	Electric, ~110W avg	Closets, corners
Sun-Mar Centrex	Continuous, central	from $1,936	By model (1000, 2000, 3000)	Electric or non-electric	Whole-house systems
ECOJOHN TinyJohn	Incinerating	from $3,095	Up to 30 uses a day	Electric or propane	No composting at all

Video: Best Composting Toilet 2026

Our walkthrough of the top features to compare and what to buy for tiny homes, RVs and off-grid living.

How to Choose a Composting Toilet

Five questions narrow 18 models down to two or three.

How many people, and how often? Two people full time fill a Nature's Head in about a month. For a family living in the cabin, a continuous Sun-Mar Excel (3 adults or a family of 5) or a batch system with spare containers keeps emptying to every few months.
What power do you have? Most models run a 12V fan that an RV or solar battery handles easily. With no power at all, choose a non-electric model such as the Sun-Mar Excel NE or the Green Toilet Family Package.
Where will the urine go? Self-contained toilets store it in a bottle you empty every few days. Separett models can drain it to a soak pit or greywater line, so there is nothing to carry.
How much room is there? Check the height and depth on the product page. The Weekender and Tiny-Pod fit tight spaces; under-floor Green Toilet systems need clearance below the floor.
Can you vent it? Most composting toilets need a vent to the outside. Plan the route before you buy. Our RV and van install guide shows how.

Types of Composting Toilets

Type	How it works	Emptying	Models	Learn more
Urine-diverting (self-contained)	Liquids go to a bottle or drain; solids dry in a bin with coir or peat.	Solids every few weeks; urine bottle every few days	Nature's Head, Separett, Sun-Mar GTG	Guide
Batch	Waste collects in one container; when full it is swapped for an empty one and left to finish composting.	Swap containers when full	Tiny-Pod, Oz-e-Pod, Green Toilet, GL 90	Guide
Continuous	Waste composts in a rotating drum and finished compost moves to a drawer.	Every few months for residential use	Sun-Mar Excel, Compact, Spacesaver, Centrex	Guide
Incinerating	Burns waste to sterile ash with electricity or propane.	Empty the ash pan	ECOJOHN TinyJohn	Guide

Video: How Do Composting Toilets Work?

Our walkthrough of how composting toilets turn waste into compost without water or plumbing.

Composting Toilet Brands We Carry

Shop Nature's Head composting toilets

Self-contained urine-diverting toilets built for RVs, boats and vans. Two models: the full-size and the Weekender.

Shop Sun-Mar composting toilets

Continuous composting toilets and central systems, including non-electric (NE) models for off-grid cabins.

Shop Separett composting toilets

Urine-diverting toilets that need no bulking material. The Villa and Tiny look and sit like standard toilets.

Shop Waterless Toilet Shop composting toilets

Batch composting toilets, from the compact Tiny-Pod to the under-floor Green Toilet systems.

Composting Toilet FAQs

What is the best composting toilet?

The best composting toilet for most people is the Nature's Head Composting Toilet ($1,035). It is self-contained, urine-diverting and needs no water or plumbing. For full-time family use choose the Sun-Mar Excel, and for a guest house or rental choose the Separett Villa.

What is a composting toilet?

A composting toilet is a waterless toilet that breaks human waste down into compost-like material instead of flushing it to a sewer or septic tank. Most use a small fan and vent to control odor, and many separate urine from solids.

What is the best composting toilet for an RV or van?

The Nature's Head is the best composting toilet for most RVs and vans: it is compact, self-contained and its 12V fan uses 1.68 amp-hours a day. The RV Pod ($999) is a good alternative with an LED indicator that shows the liquids level.

What is the best composting toilet for a cabin?

For a cabin used full time, the Sun-Mar Excel handles 3 adults or a family of 5. If the cabin has no power, choose the non-electric Sun-Mar Excel NE (up to 5 adults) or the Green Toilet Family Package, which needs no electricity.

What is the best composting toilet for a tiny house?

The Separett Tiny ($999) is our pick for tiny houses: it drains urine away, needs no bulking material and runs on 12V or household power. The Tiny-Pod ($749) suits 1 to 2 users on a tighter budget.

How much does a composting toilet cost?

Composting toilets at Wild Oak Trail range from $639 for the Sun-Mar GTG to $2,199 for the Sun-Mar Excel. Most popular models, including the Nature's Head, Separett Villa and Separett Tiny, cost about $1,000. The ECOJOHN TinyJohn incinerating toilet starts at $3,095.

Do composting toilets smell?

A properly installed composting toilet should not smell in the bathroom. A fan pulls air out through a vent, and urine diversion keeps the solids dry, which is where most odor comes from. Smell usually means a blocked vent, a stopped fan or too little cover material.

Do composting toilets need electricity?

Most composting toilets run a small fan, usually on 12V, so they work from an RV or solar battery. Non-electric options include the Sun-Mar Excel NE, the non-electric Sun-Mar Centrex models and the Green Toilet Family Package.

How often do you empty a composting toilet?

It depends on the type and the number of users. A Nature's Head used full time by two people needs the solids emptied about once a month and the urine bottle every 2 to 4 days. Sun-Mar continuous units are emptied every few months in residential use.