Best Small Toilet of 2026 — Measure These 4 Numbers First

The best small toilet is not the shortest one in the catalog. That’s the single most common mistake buyers make in this category — they find a toilet with a 24 or 25-inch depth, order it, and discover that it still doesn’t fit the way they expected because depth was only one of four measurements they needed to check. A toilet that’s 25 inches deep but 16 inches wide can still block a narrow doorway. A toilet with a 12-inch rough-in won’t work in a bathroom where the drain was plumbed at 10 inches. A compact toilet with a 14-inch seat height might clear the door but be uncomfortable for every adult who uses it daily.

Space-saving and comfort are not opposites — but finding the overlap between them requires understanding what you’re actually measuring and why. The three picks below have been chosen because each one solves a specific small bathroom scenario, and each one passes on all four critical dimensions: depth, width, rough-in compatibility, and seat height. Measure your space first. Then pick.

Most compact toilet guides recommend the HOROW T0338W for one reason — the numbers add up in a way that almost no other model matches at this price. A 26.6-inch depth is genuinely compact, sitting roughly 4 inches shorter than a standard elongated toilet. A 15-inch width is narrower than almost any comparable ADA-height model. And a perfect 1,000g MaP flushing score means the space savings don’t come at the cost of performance.

The one-piece skirted construction is what makes this toilet work visually in tight spaces as well as physically. Without the tank-bowl seam, without the exposed trapway curves, and without bulky tank hardware breaking the profile, the T0338W looks significantly smaller than it actually is. Clients who’ve installed it in Baltimore row house bathrooms and Manhattan studio apartments consistently report that it made the room feel meaningfully larger — not because of the inch savings alone, but because a clean, seamless profile reads as less visually dominant than a traditional two-piece toilet in the same space.

The 17.3-inch ADA comfort height is the specification that separates this from most ultra-compact small toilets, which sacrifice height for depth savings. A 14 or 15-inch seat height might clear a doorway more easily, but it’s genuinely uncomfortable for adults using the toilet daily for years. This one gets the height right without adding depth. Dual flush at 0.8 GPF and 1.28 GPF means water savings over a standard 1.6 GPF toilet are real and cumulative. The 10-inch rough-in option is genuinely useful in older apartments and row houses where the drain was plumbed before 12-inch became the standard. Full context: best dual flush toilets compared.

When the HOROW T0338W’s 26.6-inch depth still won’t clear the door swing, the HWMT-8733 is the next answer. At 25 inches deep and 13.4 inches wide, this is one of the smallest floor-mounted toilets available from any brand that doesn’t involve a macerating pump system. That 13.4-inch width is the specification that surprises most buyers — nearly 2 inches narrower than the already-compact T0338W. In a bathroom where the toilet sits beside a vanity with 14 inches of clearance, that 1.6-inch difference can be the margin between workable and not.

The round bowl is what enables the depth savings. Standard elongated bowls add approximately 2 inches of front-to-back depth compared to round. In a normal bathroom, that 2 inches is worth trading for the seated comfort advantage of elongated. In a powder room or half bath that’s used primarily for liquid waste and brief visits, that comfort trade-off is entirely reasonable. Multiple buyers who’ve installed the HWMT-8733 in basement bathrooms, under-stair powder rooms, and RV conversions report that the round bowl is comfortable for its intended use case. Nobody is spending 20 minutes in this toilet.

The siphon dual flush at 1.1 and 1.6 GPF clears the bowl reliably on the full flush setting. HOROW includes the soft-close seat, wax ring, and floor bolts in the package. Side installation access holes make it significantly easier to reach the mounting bolts in tight spaces — a plumber who’s tried to install a standard toilet in a 28-inch-wide powder room will immediately appreciate this design choice. Available in 10″ and 12″ rough-in. For applications where the T0338W fits but you want even more depth margin: ultra-compact toilet options.

The Santa Rosa is the answer for renters and apartment dwellers who need a compact toilet with long-term reliability, easy parts availability, and a brand name that property managers and building superintendents will recognize. At 28.19 inches deep, it’s not the smallest option on this list — but Kohler’s compact elongated bowl geometry puts elongated seating comfort into the same front-to-back depth as most round-bowl toilets. That’s a meaningful distinction for anyone who uses this toilet as a primary daily bathroom.

The AquaPiston canister flush is what drives the water savings without sacrificing power. Instead of a traditional flapper that opens partially and unevenly, the AquaPiston canister lifts straight up — opening a 360-degree water path simultaneously from all sides of the valve. Kohler guarantees this canister won’t crack or warp. At 1.28 GPF, it delivers consistent bowl coverage and clears reliably in a single flush. The lower, narrower tank profile also means this toilet fits under bathroom counters and vanity overhangs that would reject a taller two-piece — a genuinely useful feature in apartments where the original layout wasn’t designed for modern toilet heights.

The real advantage for apartments specifically is serviceability. Every replacement part for the Santa Rosa — fill valve, flush valve, canister seal, seat hardware — is available at every Lowe’s and Home Depot in the country. When something eventually wears out, a building handyman or the tenant themselves can source and replace parts without special ordering. In a rental context where the property owner maintains the toilet, this nationwide parts availability is worth real money over a fixture’s lifetime. Quiet-Close seat is included. Available in 11 colors. Full brand comparison: best Kohler toilets.

How to Actually Measure for a Small Toilet — The 4 Numbers Most Guides Skip

Toilet spec sheets show the dimensions of the toilet. They don’t show you whether those dimensions will actually work in your specific bathroom. These four measurements need to match your space, not just your wishlist.

Measurement 1 — Depth (front to back). This is the distance from the finished wall behind the toilet to the outermost front edge of the bowl. This number determines whether the toilet clears the door swing, leaves adequate standing space, or allows someone to pass between the toilet and the opposite wall. The IBC recommends 21 inches of clearance in front of the toilet (15 inches minimum for code compliance). To calculate whether a toilet fits, measure from the wall to the nearest obstruction — door, vanity, tub — and subtract 21 inches. What remains is your maximum allowable toilet depth. Most standard elongated toilets run 29 to 31 inches. Compact models run 25 to 28 inches.

Measurement 2 — Width. The widest point of most standard toilets is 17 to 20 inches, measured across the tank. Code requires a minimum of 15 inches of clear space from the toilet centerline to any side obstruction — which means you need 30 inches of total side clearance (15 + toilet center + 15) for the toilet to sit legally. In a very narrow bathroom, a toilet at 18 inches wide leaves only 6 inches of clearance per side in a 30-inch-wide room — technically legal but extremely tight. Compact models at 13 to 15 inches wide give you measurably more side clearance in the same space.

Measurement 3 — Rough-in. The rough-in is the distance from the finished wall (not the baseboard) to the center of the floor flange. Most post-1980 construction uses a 12-inch rough-in. Older homes — pre-1960 especially — often used 10 or 14-inch rough-ins. Measure before purchasing. A toilet with a 12-inch rough-in specification installed on a 10-inch rough-in will either not reach the wall or will sit too far forward. Buying the correct rough-in size is not optional — it’s the first thing your plumber will check.

Measurement 4 — Seat height. The distance from the finished floor to the top of the toilet seat, with seat installed. Standard height runs 14 to 16 inches. Comfort/ADA height runs 17 to 19 inches. For adults who are 5’6″ or taller, or anyone with knee or hip concerns, comfort height is meaningfully more comfortable daily. For children as primary users, standard height works better. Some of the smallest compact toilets trade height for depth — they hit 14 or 15 inches to stay under an obstruction but end up uncomfortable for regular adult use. Verify the seated height against the household’s needs, not just the available space. Full guide: comfort height vs standard height toilet.

Best Small Toilet — Frequently Asked Questions

Space Saving Toilet — Which Type Actually Saves the Most Space?

Compact floor-mounted toilets save 2 to 6 inches of depth compared to standard elongated models. Corner toilets save the corner footprint but add similar total depth from the diagonal position. Wall-mounted toilets save the most floor space of any type — the entire base footprint disappears — but require in-wall carrier installation that adds $500 to $1,000 to the project cost. For most small bathroom renovations where a toilet is simply being replaced in its existing position, a compact floor-mounted model like the HOROW T0338W or HWMT-8733 delivers the most practical space savings at the lowest total cost. Wall-mounted makes sense when the wall is already open during a renovation. Full comparison: wall mounted toilet vs floor mounted.

Small Toilet for Apartments — What to Look for When You Don’t Own the Plumbing

Apartment and rental installations have specific requirements that owner-occupied homes don’t. First, parts must be available locally — when something fails at 11 PM, the building super needs to source a replacement fill valve from the nearest hardware store, not wait for a special order. This makes Kohler and American Standard the safest brand choices for rental properties. Second, the toilet must fit the existing rough-in without requiring drain relocation — any drain work in a rental requires coordination with the building and often with the city. Third, a one-piece toilet makes cleaning easier for tenants who may not be diligent with a brush. All three factors point toward the Kohler Santa Rosa as the apartment-specific recommendation. More: best toilet brands for reliability.

Water Saving Small Toilet — Does Compact Size Affect Water Efficiency?

No — water efficiency is determined by the flush mechanism design and GPF rating, not by the toilet’s physical size. A compact toilet at 1.28 GPF saves exactly the same amount of water as a full-size toilet at 1.28 GPF. All three toilets on this list are WaterSense certified at 1.28 GPF or below — the EPA threshold that qualifies for utility rebates in many states and is required by law in California, Colorado, Texas, and several other states. The HOROW T0338W’s 0.8/1.28 GPF dual flush provides the most granular water savings — using the 0.8 GPF light flush for liquid waste reduces consumption to half of a standard 1.6 GPF toilet on most flush events. Full efficiency guide: dual flush vs single flush toilet.