What Is the Standard Length of a Bath in the UK?
The standard and most common bath length in the UK is 1700mm, which is 170cm or approximately 5ft 7in. It is a useful reference size, but it is not right for every bathroom. Shorter and longer baths are widely available, so the best choice depends on your room, the bath layout you want and the exact product dimensions.
A familiar standard UK bath size is around 1700mm long by 700mm wide. That is 170cm x 70cm, or roughly 5ft 7in x 2ft 4in. However, 1700mm baths come in other widths and not every bathroom needs the standard length. If 1700mm suits your room and you want one dedicated reclining end, browse our 1700mm single ended baths.
Standard Bath Sizes in CM, MM & Feet
UK retailers normally list bath dimensions in millimetres, while homeowners often measure in centimetres or feet and inches. These imperial conversions are rounded to the nearest inch.
| Bath length | Centimetres | Approx. feet & inches | Typical use |
|---|---|---|---|
| 1400mm | 140cm | 4ft 7in | Compact bathrooms and shorter spaces. |
| 1500mm | 150cm | 4ft 11in | A shorter alternative to 1700mm. |
| 1600mm | 160cm | 5ft 3in | Useful where a standard-length bath will not fit. |
| 1650mm | 165cm | 5ft 5in | An intermediate size available in some ranges. |
| 1700mm | 170cm | 5ft 7in | The standard and most common UK bath length. |
| 1800mm | 180cm | 5ft 11in | A longer option where more room is available. |
| 1900mm | 190cm | 6ft 3in | A larger size found in selected ranges. |
Is 1700mm Right for Every Bathroom?
No. Although 1700mm is the standard and most common bath length, compact rooms may need 1500mm, 1600mm or another shorter size. Larger bathrooms may comfortably take an 1800mm bath.
Choose the length that fits the actual installation space rather than trying to make the standard size fit every room.
What Is the Standard Bath Width?
Around 700mm, or 70cm, is the familiar standard width paired with a 1700mm bath. Wider 750mm and 800mm models are also common, so length alone does not tell you how much floor space a bath will use.
Check both length and width when planning the room.
Choosing a Shorter or Longer Bath
If 1700mm does not suit the room, compare nearby sizes rather than treating the standard length as compulsory. For a conventional single-ended layout, you can look at 1600mm single ended baths, 1650mm single ended baths or 1800mm single ended baths.
The exact internal bathing space can differ even between baths with the same external length, so compare the individual product dimensions and shape as well as the headline size.
How to Measure for a New Bath
Measure the actual installation area before ordering, especially if wall finishes or bathroom furniture are changing.
Measure the available length
Measure the space where the bath will sit and allow for the finished walls or panels if the room is still being renovated.
Measure the available width
Check how far the bath can project into the room without interfering with the toilet, basin, furniture or doorway.
Check the exact product drawing
Use the individual bath specification for installation. A 1700mm category label is a shopping guide, not a substitute for the precise dimensions of the product.
Plan the fittings at the same time
Allow for taps, waste, panels and any shower screen so the whole installation works together.
If 1700mm Fits, Choose the Bath Type Next
Once you know 1700mm is the right length, you can choose the layout that best suits how you use the bathroom. The same nominal length is available across several bath types.
Standard Bath Length FAQs
Shop Baths by Size and Type
Start with the length that fits your bathroom, then compare the bath type, width, internal shape and exact product dimensions.
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