Bath sizes and how to measure for a new bath

A new bath is one of the few bathroom items you cannot easily swap later. It is tiled in, plumbed in, and often carried up stairs. Getting the size right on paper first saves a lot of stress on install day.

This guide covers the bath types in our range, the real sizes they come in, and a simple way to measure your room before you choose. All product sizes below are taken from the supplier details on our product pages.

The three bath types

• Freestanding: finished on every side and sits away from the walls. It needs the most floor space but gives the most choice of shape and material. Browse freestanding baths.
• Back to wall: the back sits flat against the wall and the front is finished, so it suits a tiled alcove or a run of wall. Browse back to wall baths.
• Corner: designed to tuck into a corner, with one finished curve into the room. Each model comes as a left or right hand version. Browse corner baths.

Common bath lengths in our range

Most baths come in a handful of standard lengths. Here is how they line up with real models:

• 1300mm: the ADP Solace 1300 corner bath, listed at 1300mm wide, 650mm deep and 545mm high. It is the smallest bath in our corner range and suits compact bathrooms.
• 1350mm round: the Pietra Bianca Romeo is a round composite stone bath, listed at 1350mm diameter and 550mm high.
• 1500mm: a very common size across all three types. The ADP Bronte 1500 back to wall bath is listed at 1500 x 750mm and 585mm high, and the Otti Attica Celine 1500 corner bath at 1500 x 750 x 580mm.
• 1530 to 1600mm: in-between sizes such as the Otti Attica Manolo 1530 (1530 x 770 x 550mm), the ADP Tranquil 1560 (1560 x 710mm, 570mm high) and the ADP Submerge 1600 (1600 x 700mm, 615mm high).
• 1700mm: the other very common length. The Otti Attica Havana 1700 back to wall bath is listed at 1700 x 800 x 580mm with an inside depth of 450mm, and the Pietra Bianca Chelsea 1700 at 1700 x 780 x 530mm.
• 1800mm: larger freestanding baths such as the Pietra Bianca Whitney 1800, listed at 1800 x 1000 x 530mm.

Notice how much the width changes as well as the length. A 1700mm bath can be 780mm or 800mm wide, and the Whitney 1800 is a full 1000mm wide. Always measure for both.

How to measure for a freestanding bath

1. Measure the floor area you can give the bath. Note the distance between walls, the vanity, the toilet and the shower screen.
2. Mark the bath outline on the floor with masking tape, using the length and width from the product page. Stand in it and walk around it. If you have to turn sideways to get past, it is too big for the room.
3. Leave room to clean behind it. A freestanding bath pushed hard against a wall leaves a gap you cannot reach. Ask your installer how much space they want for cleaning and for fitting the waste.
4. Check the tap position. A freestanding bath is filled by a wall spout, a floor mounted mixer or a bath mixer. Decide early, because a floor mixer needs plumbing through the floor. See freestanding bath mixers and bath spouts.
5. Find the waste. Most freestanding baths drain through a centre or end waste in the base. Pietra Bianca baths list a 40mm centre waste. ADP notes its baths are suited to keep the waste in line with floor plumbing, and that a short waste may be required; confirm the waste with your plumber.

How to measure for a back to wall or corner bath

1. Measure the alcove or wall length at floor level and again at rim height. Old walls are not always square, so the two numbers can differ.
2. Measure the depth from the wall to where the front of the bath can sit without blocking the door or vanity.
3. For a corner bath, measure both walls from the corner, and decide whether you need a left or right hand model. Check the drawing on the product page to see which hand suits your room.
4. Note where the overflow and waste sit. On the ADP Solace corner bath, the overflow sits at the front on the 1300mm size and at the back on the 1500 and 1700mm sizes. That changes where the waste goes.

Check the delivery path

A bath has to get into the room before it can be installed. Measure every door, hallway and stair turn between the front door and the bathroom, and compare them with the bath's width and height. A 1700 x 800mm bath on its side is still 580mm or more deep, so a narrow hallway with a tight turn can be the real limit.

Weight matters more than most people expect

Material changes the weight a lot:

• Acrylic: ADP baths are Lucite sanitary-grade acrylic and Otti baths are premium sanitary grade acrylic. These are the lightest to carry and the easiest choice for an upstairs bathroom.
• Composite stone: Pietra Bianca baths are much heavier. The Chelsea 1700 is listed at around 140 kg and the Romeo at around 160 kg, before you add water and a person.
• Solid cast marble: ADP offers models such as the Tranquil and Submerge in solid cast marble, which ADP says keeps the water warm for longer than acrylic.
• Terrazzo: Madu Living baths are made in terrazzo. See Madu Living for the range.

For any heavy bath, ask your builder to check the floor before you order. Our stone vs acrylic bath comparison goes further into the trade-offs.

Capacity: how much water it holds

Bigger is not always better if you are watching hot water. Some supplier capacities from our range:

• ADP Bronte 1500 freestanding: 240 L
• ADP Bronte 1500 back to wall: 233 L
• ADP Solace 1700 freestanding: 285 L
• ADP Tranquil 1560: 270 L
• ADP Submerge 1600: 370 L

If your hot water system is small, a deep, high-capacity bath may not fill to a warm bath in one go. Ask your plumber about your system before you choose a large bath.

What is in the box

Check the product page for what is included. ADP lists plug and waste as not included on its baths and notes they suit a 40mm waste with overflow. Pietra Bianca lists an optional overflow drain and matching stone drain cover, sold separately at additional cost. Otti Attica back to wall baths list a 50mm diameter waste.

A short checklist

1. Bath type: freestanding, back to wall or corner (and left or right hand).
2. Length and width from the product page, taped out on the floor.
3. Rim height and inside depth, if you want a deep soak.
4. Tap position: wall spout, floor mixer or bath mixer.
5. Waste position and size, confirmed with your plumber.
6. Delivery path measured, door to bathroom.
7. Weight checked with your builder for stone and cast marble.
8. Plug, waste and overflow: included or separate.

See the sizes in person

A 1500mm and a 1700mm bath look similar in photos and very different when you stand next to them. Our Loganholme showroom has freestanding and stone baths on display, a short drive from Underwood, Springwood and Shailer Park. Bring your floor plan and we can talk through which sizes fit. Start with all baths, stone baths or the freestanding bath sizing and styles guide.

Visit, delivery and contact

Our showroom is at Shop 4, 1 Bryants Rd, Loganholme QLD 4129 (opening hours and directions), where you can see finishes in person and collect your order free once it is ready. We also deliver Australia-wide, with the exact rate shown at checkout (see delivery and returns). Questions? Call 07 3209 9644 or send us a message.