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What length spirit level do I need?

Updated: 22 October 2026

You are setting kitchen units along a 600 mm base run, then checking a doorway and a long plasterboard wall. One spirit level misses one of those jobs, because it only reports the span it touches. This page answers what length spirit level do I need by matching four spans to the work and converting inch packs with arithmetic. The nine sets sit in the [spirit level set comparison](/hub/measuring-and-marking-tools/spirit-level-set). Peter F. read those amazon.co.uk length lines on 22 October 2026. There was no lab test. A qualifying purchase can earn us a commission at no extra cost to you.

You are setting kitchen units along a 600 mm base run, then checking a doorway and a long plasterboard wall. One spirit level misses one of those jobs, because it only reports the span it touches.

Our top picks

URASISTO URASISTO 3-piece spirit level set

Best overall

URASISTO URASISTO 3-piece spirit level set
9.6/10about £35.99
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TOUGH MASTER TOUGH MASTER magnetic 3-piece set

Best value

TOUGH MASTER TOUGH MASTER magnetic 3-piece set
8.8/10about £45.99
View offer
AB Tools AB Tools 4-piece spirit level set

Alternative

AB Tools AB Tools 4-piece spirit level set
8.6/10about £40.99
View offer
On this page
  1. 1.The four spans that cover most UK work
  2. 2.Inch packs are the same ladder only after you convert
  3. 3.What each set in this comparison actually contains
  4. 4.Which gap matters for your job

The four spans that cover most UK work

BuildWiz and Kitd put a torpedo on pipes, conduit and back boxes, a 600 mm level on kitchens, shelves, sills and socket heights, and a 1,200 mm level on doors, studs and general site checks. About 1,800 mm is for a long wall, a screed, a bifold track or a full-height frame. BuildWiz describes its torpedo as about 230 mm, while the short pieces here cluster near 250 mm, 25 cm or 10 in.

Inch packs are the same ladder only after you convert

Some listings print inches. Convert at 25.4 mm per inch and keep the result as arithmetic. An inch listing prints inches. The millimetres are your sum. At that rate, 24 in is about 610 mm, 48 in is about 1,219 mm, and 72 in is about 1,829 mm. A 24 in level does the 600 mm kitchen work, a 48 in level does the 1,200 mm door and stud work, and a 72 in level falls in the 1,800 mm region. This page converts only those three.
URASISTO URASISTO 3-piece spirit level set

Testsieger

URASISTO URASISTO 3-piece spirit level set
9.6/10about £35.99
View offer

What each set in this comparison actually contains

OX Pro (B0H2JFZB5C) and OX Trade (B0H2JNSYY3) list 600 mm and 1,200 mm, with no torpedo and no 1,800 mm piece. TOUGH MASTER (B0B7BYXWQX) lists 250 mm, 600 mm and 1,200 mm. Firecore (B0H2HM4M9V) lists 25 cm, 30 cm, 60 cm and 120 cm, and no 180 cm level. Silverline (B003TO2MC8) lists 400 mm, 600 mm and 1,000 mm, a different ladder from 600 / 1,200 / 1,800. AB Tools (B01NBAUC4B) prints 10 in, 24 in, 48 in and 72 in. The 72 in piece is the only longest level here in the 1,800 mm region, as arithmetic, because the listing prints inches. URASISTO (B0C23SN57K) lists 12 in, 20 in and 40 in, with no 48 in and no 72 in. URASISTO (B0D52T336V) lists 10 in, 16 in, 24 in, 32 in and 48 in, and stops short of 72 in. Milwaukee (B07GXLTFJF) clashes: the title says 180 cm, 120 cm and 6 cm, and the bullets say 180 cm, 120 cm and 60 cm. Leave that clash unresolved.

Which gap matters for your job

Kitchens, shelves and sills need 600 mm or a converted 24 in level. Doors and studs need 1,200 mm or 48 in. Long walls, screeds and full-height frames need about 1,800 mm or 72 in. Pipes and back boxes need a torpedo near 250 mm, though BuildWiz treats it as optional for a homeowner at second fix. Once the spans fit, brand and stated accuracy sit on the best spirit level set page. Before price, follow the spirit level set buying guide. The flip test for level and plumb is on how to check a spirit level set.

Common questions

What is the 600 mm spirit level for?
A 600 mm spirit level is the length BuildWiz and Kitd give to kitchens, shelves, sills and socket heights. It reads a base unit or a worktop, and it fits where a 1,800 mm level cannot. Compared with a torpedo near 250 mm, it covers a carcass rather than a pipe. On a full wall it misses a gradual bow.
What is the 1,200 mm spirit level for?
The 1,200 mm spirit level is the general site length for doors, studs, blockwork and windows. A 48 in level is about 1,219 mm at 25.4 mm per inch, so it does the same job a few millimetres longer. A narrow kitchen carcass still wants 600 mm, because 1,200 mm will not sit on the unit. A long wall or a screed still wants about 1,800 mm.
When do I need a spirit level of about 1,800 mm?
You need about 1,800 mm for a long wall, a screed, a bifold track or a full-height frame. Kitd also places large-format tile in that band, and treats 2,000 mm and longer as specialist. A 72 in level is about 1,829 mm at 25.4 mm per inch, so it sits in the same region. You can skip it for a carcass, a shelf or a socket height.
Is a torpedo spirit level enough for a wall?
A torpedo reports only the span it touches, about 250 mm, 25 cm or 10 in on these listings. BuildWiz describes a torpedo of about 230 mm for pipes and conduit, and says that past about 400 mm you should use at least a 600 mm level. The short vial can sit on two high spots and miss the bow between them. For a stud wall or a door lining, use 600 mm or 1,200 mm.
Which sets include a torpedo and a full-height level?
TOUGH MASTER pairs 250 mm with 1,200 mm and has no 1,800 mm piece. Firecore pairs 25 cm with 120 cm and has no 180 cm piece. AB Tools pairs 10 in with 72 in, which reaches the full-height span after you convert. URASISTO B0D52T336V stops at 48 in. OX Pro and OX Trade stop at 1,200 mm. Milwaukee lists 180 cm, while 6 cm and 60 cm stay unresolved.

Related pages

DIY or trade spirit level set

Spirit level set

Best spirit level set: who the 0.5 mm/m picks suit

Spirit level set buying guide: check lengths first

How to check a spirit level: level and plumb vials

Sources

Public sources from the research notes, then the pages named there. Shelf prices are the amazon.co.uk figures stored for this set. Scores are the listing stars scaled for the table. This is not a laboratory test. Retrieved 22 October 2026.

  1. BuildWiz, box versus I-beam, flip test and sizes (retrieved 22 October 2026)
  2. Kitd, trade lengths and 0.5 mm/m (retrieved 22 October 2026)
  3. Consumer Rights Act 2015, section 9 (retrieved 22 October 2026)
  4. Stabila Type 96 datasheet, 0.5 mm/m and 0.75 mm/m (retrieved 22 October 2026)
  5. Screwfix, OX Pro single 1,200 mm OX-P024412 (retrieved 22 October 2026)
  6. OX Toolshop, flip test (retrieved 22 October 2026)
  7. Sealants and Tools Direct, Silverline 119688 (retrieved 22 October 2026)