10 Best One Piece Toilets 2026 in the United States

The TOTO WASHLET+ Nexus One-Piece Toilet is an elongated-shaped toilet, which many find more comfortable compared to round bowl designs. The integrated WASHLET+ bidet seat offers a variety of luxurious features including warm water washing, an auto open/close lid, a heated seat, and a warm air dryer. These features can greatly enhance the user experience with customizable settings for temperature and pressure.

Furthermore, the EWATER+ system mists the wand and toilet bowl, helping to keep the unit clean without harsh chemicals. The toilet uses a 1.28 gallons per flush (GPF) system, making it water-efficient and eco-friendly. At 27 inches in height, it is a comfortable height for most users, and its sleek design hides water supply and power cords for a cleaner look.

The toilet and bidet are made from a combination of ceramic and plastic materials, finished in a cotton white color, which can easily fit into most bathroom decors. One potential downside is its relatively high weight at 116 pounds, which might make installation more challenging. Additionally, the bidet seat is made of plastic, which may not feel as premium as other materials. The contemporary design and array of features make it a great choice for those looking to upgrade their bathroom experience with advanced convenience and cleanliness features.

The Casta Diva Elongated One-Piece Toilet is a compact, modern choice designed to blend style with functionality. Its one-piece, skirted design makes cleaning easier and helps prevent leaks, which is a real plus in bathroom maintenance. The elongated bowl shape offers more seating comfort compared to round bowls, and the 17-inch ADA comfort chair height suits most adults, making it easier to sit and stand up. It features a dual-flush system with options for 1.1 gallons per flush (liquids) and 1.6 gallons per flush (solids), meeting EPA WaterSense standards for water efficiency, so it helps save water without sacrificing flush power.

The flushing system uses a powerful siphon jet with a fully-glazed trapway, which usually means quiet and effective flushing with less risk of clogs. The toilet's dimensions are on the compact side, which is good for smaller bathrooms. Its seat is made from durable polypropylene with a soft-close function, preventing loud slamming and adding to user comfort. Installation is straightforward with a standard 12-inch rough-in and included hardware, even for those with little plumbing experience.

Weighing 125 pounds means it might be a bit heavy to handle during installation without help. Also, while the design is modern and smooth, some may prefer a different seat shape than the U-shaped one provided. The one-year limited warranty and lifetime technical support add peace of mind. This toilet is a solid pick for anyone looking for an efficient, comfortable, and stylish one-piece toilet, especially suited for small to medium-sized bathrooms.

The Kohler Leap One-Piece Elongated Smart Toilet is a modern and well-equipped choice for those looking for a comfortable and hygienic bathroom fixture. Its elongated bowl shape offers extra seating space, which many find more comfortable compared to round bowls. The dual-flush system allows you to choose between a light 1.0 gallon flush for liquid waste and a stronger 1.28 gallon flush for solid waste, helping to save water without sacrificing performance. With a Comfort Height design, this toilet sits at chair height, making it easier for most adults to sit down and stand up.

The fully skirted trapway simplifies cleaning by hiding the pipes and reducing places where dirt can accumulate, while the quiet-close seat prevents loud slamming. One of the standout features is the integrated bidet system with a stainless steel wand that offers adjustable spray options, warm water, and self-cleaning with UV light, which improves hygiene and user convenience. Motion-activated lid opening and closing add a touch of smart technology, enhancing the hands-free experience.

The toilet’s material is high-quality plastic with a sleek white finish that fits well in contemporary bathrooms. At just over 20 inches tall and weighing around 106 pounds, it’s a solid, floor-mounted model that should be stable and durable. The plastic seat is standard but functional. Due to its advanced features and weight, it might be pricier and more complex to install than basic models. Additionally, the plastic finish is easy to clean but may not feel as premium as ceramic or porcelain seats to some users. This toilet is ideal for those seeking a smart, water-efficient, and comfortable one-piece toilet with built-in bidet functions, especially when upgrading a bathroom with modern conveniences.