How Composting Toilets Work (The Actual Science, Explained)

The five-step process behind composting toilets — urine diversion, carbon additive, aerobic decomposition, ventilation, and emptying — and what breaks down when they smell.

What Is a Composting Toilet? A Complete Beginner’s Guide

What a composting toilet actually is, how it differs from cassette and incinerating toilets, and the design choices that determine whether it smells.

Composting Toilet FAQ: Every Question Answered

The composting toilet FAQ catch-all: getting started, odor and hygiene, installation and use, legal questions, and troubleshooting, all in one place.

Electric vs. Non-Electric Composting Toilets

Electric vs. non-electric composting toilets compared: what power actually does (ventilation, agitation, heating), and how to choose based on your power situation.

Composting Toilet Capacity: How Long Between Empties

A complete composting toilet capacity guide: solids and liquids capacity for every model, real-world emptying frequency, and how to size for your household.

Composting Toilet Price Comparison: All Brands

A complete composting toilet price comparison across every brand and DIY tier covered on this site, from a $15 bucket build to a $2,000 cabin-scale system.

Composting Toilet Size Chart: Which Fits Your Space

A complete composting toilet size chart comparing every model covered on this site by exact footprint, from smallest portable units to cabin-scale systems.

Composting Toilet Parts List: What You Actually Need

A complete composting toilet parts list organized by function — solids, liquids, odor control, ventilation, tools, and cleaning supplies — with rough costs.

DIY Urine Diverter Guide: Build or Buy

A complete DIY urine diverter guide: how to build one from a second bucket, purchased diverter styles and pricing, installation, and troubleshooting.

Cheapest Way to Start a Composting Toilet

The cheapest ways to start a composting toilet, from a $15 bucket setup to a $300 manufactured unit, with honest tradeoffs at every budget tier.