The best Dial calipers, compared.
Top pick: Mitutoyo 505-732 dial caliper – Top pick only when the seller matches Mitutoyo’s own 505-732 description: about £86.71, 4.6 from 149 reviews, with reviews describing a 0.01 mm dial. Best value: Standard Gage dial caliper, 150 mm – Best value at about £45.99 for a stainless 0–150 mm dial whose bullets state 0.02 mm and ±0.02 mm, with 4.6 from 80 reviews. Updated October 2026.
A dial caliper is a slide caliper with a rack and pinion and a round dial. You add the beam reading to the needle. Home machinists, woodworkers and fitters use them for outside, inside, depth and step checks without a battery. Look for a stated resolution, a stated error, hardened stainless jaws and a lock. The treats 0.02 mm as a typical dial resolution, and dirt in the rack can make the needle miss zero. A typical listing does not state a certificate. The [dial caliper buying guide](/hub/measuring-and-marking-tools/dial-caliper/sub/dial-caliper-buying-guide) sets the order: dial first, then the face, then the error and the material. It warns that dirt in the rack lets the pinion jump, so the needle misses zero. Withdrawn BS 887 was for verniers, not a dial requirement. The error should not be finer than the scale interval. Metric stainless dials at 0–150 mm dominate UK catalogues. A 0.02 mm dial usually moves 2 mm per revolution. Inch dials are often 0.001 inch per division. Plastic dials copy the shape and are frequently the wrong unit. Longer beams exist. 150 mm is the usual first size. Several UK reviews say the yellow dial is imperial.
A dial caliper is a slide caliper with a rack and pinion and a round dial. You add the beam reading to the needle.
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Personal buying guide
Question 1 of 2
What do you want this dial to do?
The Mitutoyo listing is the 505-732 name at £86.71, with 4.6 from 149 amazon.co.uk reviews, a stated range of 0–150 mm and a non-digital display. The accuracy line on that page is 0.002 in, and the weight field says 198 g, which is not a millimetre error and not the 176 g figure on Mitutoyo UK’s own 505-732 shop page. In the first 50 review texts the dial is described as yellow, marked in 0.01 mm, with one full turn per millimetre, and several reviewers say the slide feels like other Mitutoyo tools they use to spot copies. None of those 50 headers say Reviewed in the United Kingdom, so this file is not a UK sample. Those texts also include a needle that was not attached, a rattling slider, a zero about 0.03 mm out, scratches on a beam sold as new, and lock screws that needed pliers. The dial cover is plastic, and the supplied case draws complaints. It is the top pick only if you confirm the seller against Mitutoyo’s own description before you treat £86.71 as that instrument. If the page in front of you still states 0.002 in, the listing text is not the shop specification.
Pros
Cons
Best for: You want the 505-732 name and you will check the seller against Mitutoyo’s own description before you rely on the £86.71 listing.
Less suitable: You need the listing’s accuracy line to be a millimetre figure, or you need United Kingdom review headers in this file. Neither is here.
Specifications
Common questions
What accuracy does this amazon.co.uk listing state?
The bullets say +/-0.002 in and the measurement-accuracy field says 0.002 in. The range bullets say 0–150 mm. Graduation is not in the spec fields.
What do the reviews say about the dial?
In the first 50 reviews, readers describe a yellow face, 0.01 mm marks and one full turn per millimetre. Those reviews are not headed Reviewed in the United Kingdom.
Did reviewers report defects?
Yes. The sample includes a needle not attached, a rattling slider, a zero that missed by about 0.03 mm, scratches on a beam sold as new, and lock screws that needed pliers.
Across 80 amazon.co.uk reviews at 4.6 stars, the Standard Gage 150 mm dial at £45.99 is the stainless metric tool in this set with a stated resolution of 0.02 mm and a stated accuracy of ±0.02 mm. The bullets name inside, outside, depth and step, a locking screw and a knurled roller, and the listing weight is 176 g. Reviewers praise a smooth slide, a clear dial and the fact there is no battery to go flat, which is why it suits a bench that has already lost a digital caliper to a dead cell. You still cannot prove that ±0.02 mm at home: the same reviews say there was no reference standard. One review describes the gearing as an inch layout remarked for metric, so one needle turn is 2 mm, and you have to add the beam with that turn in mind. The title says a case while the bullets say a padded bag, and one buyer reported a missing tie-bar screw. It is the best value here when a 0.02 mm stainless dial at this price is the job, not when you need a 1 mm-per-turn face you have already matched to the maker.
Pros
Cons
Best for: You want a stainless 150 mm metric dial around £46, you can read a 0.02 mm face, and you will check whether one turn is 2 mm before you trust a size.
Less suitable: You need a 0.01 mm dial that moves 1 mm per turn, with a millimetre error on the listing, or a certificate. This page does not give you either.
Specifications
Common questions
Does this Standard Gage dial read millimetres?
The bullets say measurement is in metric millimetres, range 0–150 mm, resolution 0.02 mm. One review says one turn of the needle is 2 mm.
Can it measure inside, outside, depth and a step?
Yes. The bullets and the item highlight name internal, external, depth and step.
Does it need a battery?
The spec fields do not list a battery. United Kingdom reviews say that is the point: there is no battery to go flat.
The Hyuduo plastic dial is listed at £12.71 and 91 g, and amazon.co.uk shows 2.7 from 25 reviews. The title and bullets say 0–150 mm, the accuracy field says ±0.05 mm, and the material field lists PLA and PE. Several United Kingdom reviews say the yellow dial they unpacked reads inches, one turn per inch, so the millimetre wording on the page was not the face in the box. One UK reviewer then received a white dial under the same description, one turn per 10 mm with 0.1 mm marks, and raised that example to 4 stars. Other UK texts call it inconsistent or toy-like, one unit arrived broken, and one review describes a worn roller that felt used. The title names length, depth and step, and it does not spell out inside jaws. Keep it only if you will read the face for inches or millimetres before you trust a size. It is the listing to skip when the job is a real metric fit.
Pros
Cons
Best for: You want a cheap plastic dial to see how the needle moves, and you will check the face for inches or millimetres before you measure.
Less suitable: You need a stainless metric dial for a machined size. United Kingdom reviews say this listing often is not that.
Specifications
Common questions
Is this plastic dial metric?
The title and bullets say 0–150 mm and the accuracy field says ±0.05 mm. Several United Kingdom reviews say the yellow dial reads inches, one turn per inch. One reviewer then received a white metric dial, one turn per 10 mm.
What is it made of?
The bullets say plastic. The material field lists PLA and PE. The weight is 91 g.
What do UK reviews repeat?
They say the tool is not consistent, looks like a toy, or arrived broken, and that the dial unit did not match the millimetre title.
Three amazon.co.uk dial caliper listings stay on this page. Shelf date 20 October 2026. The number on each card is the star line mapped onto a 0–80 scale already stored in the display file: 4.6 becomes 74 and 2.7 becomes 43. Both stainless listings share 74, so the number does not separate them. The top pick is Mitutoyo B0142HWZSG only if the seller matches Mitutoyo’s own 505-732 description. The best value is Standard Gage B0DB29M9M7 at about £45.99. Hyuduo has no award. The weights below sum to 100 and describe how this page reads a listing. They are not a calibration, and stars are not an error band.
Amazon evidence
35%Stars and review counts are the amazon.co.uk lines: Standard Gage 4.6 from 80, Mitutoyo 4.6 from 149, Hyuduo 2.7 from 25. A sample with no United Kingdom headers cannot carry the same weight as texts headed Reviewed in the United Kingdom. The Mitutoyo file’s first 50 headers do not say that. Standard Gage mixes UK and other countries.
Listing fit
25%Range, dial unit, graduation, stated error, material and the four measuring jobs count only when that ASIN prints them, or when a review in the file describes them. A 0–150 mm stainless dial with 0.02 mm and ±0.02 mm in the bullets fits this category. An accuracy line of 0.002 in on a millimetre model name does not become the shop specification.
Review outcome
25%A smooth slide and no battery score up where reviewers say so. A missing screw, a detached needle, a unit that does not match the title, or a zero that will not repeat comes off. Several UK reviews of the plastic dial say the yellow face is imperial against a millimetre title.
Value
15%About £45.99 for a stainless metric dial whose bullets match millimetres is the value line in this set. About £86.71 is the price of a model name you still have to match to the maker. About £12.71 is not a saving if the face is the wrong unit.
Buy a dial caliper in this order: confirm it is a dial, read the face, then take the stated error, the material and the seller. Stars do not replace a maximum permissible error. About £12.71 is not a saving if UK reviews received an inch dial under a millimetre title. About £86.71 is not Mitutoyo UK’s 505-732 shop specification while the listing still says 0.002 in. The top pick and the best value on this page follow those conditions. Neither is a laboratory result.
A dial caliper is a slide caliper with a rack and pinion and a round dial, so you add the beam reading to the needle. In the UK it is bought by home machinists, woodworkers and maintenance fitters who want outside, inside, depth and step checks without a battery. This comparison looks at three amazon.co.uk listings, all stated as 0–150 mm, with shelf prices on 20 October 2026. It is not a laboratory test. None of the three shows a UKAS certificate.
A 0.02 mm dial usually moves 2 mm per revolution. A 0.01 mm dial usually moves 1 mm. NPL calls these DT-type and DE-type. One Standard Gage review says one turn is 2 mm. Add the beam with that turn in mind, or the size is out by a millimetre on that revolution.
The Hyuduo title says 0–150 mm. Several United Kingdom reviews say the yellow dial reads inches, one turn per inch. One buyer then received a white metric dial under the same description. The description is part of the contract, and you still have to read the face in the box.
0.01 mm marks are not a claim of ±0.01 mm. The Mitutoyo listing states 0.002 in, not the millimetre MPE on Mitutoyo UK’s 505-732 page. The Standard Gage bullets state ±0.02 mm, and reviewers say they had no reference to prove it. Leave oil on the jaws and the needle can miss zero.
Confirm the tool is a dial, not a digital caliper and not a vernier. This hub keeps those as other comparisons. Then read the face. Metric or inch is the first fork, and the second is whether one needle turn is 1 mm or 2 mm. NPL’s table calls a 1 mm turn the DE-type, usual with 0.01 mm graduations, and a 2 mm turn the DT-type, usual with 0.02 mm. Inch dials are often 0.001 inch per division.
Take the maker’s error figure, not the star rating. Resolution is the smallest mark. Maximum permissible error is the accuracy claim. BS EN ISO 13385-1:2019 covers dial callipers, and the error should not be finer than the scale interval. The usual reference temperature is 20 °C. None of these three listings shows a UKAS certificate. Standard Gage states ±0.02 mm on stainless, with a lock and a knurled roller, at about £45.99 and 176 g.
Three typical situations, each with a recommendation from this comparison.
You want outside, inside, depth and step on a home bench, and you can live with 0.02 mm. The Standard Gage dial is about £45.99 in stainless, with those four jobs in the bullets and 4.6 from 80 reviews. Check whether one turn is 2 mm before you trust a size.
You are matching a seller to Mitutoyo’s own 505-732 page, not treating the amazon.co.uk accuracy line as that page. Listing B0142HWZSG is about £86.71, with 4.6 from 149 reviews. Reviews describe 0.01 mm and 1 mm per turn. The listing itself states 0.002 in and 198 g.
The Hyuduo plastic dial is about £12.71 and 91 g, with 2.7 from 25 reviews. The title says millimetres. Several UK reviews say the yellow dial is imperial, and one buyer later received a white metric face under the same description. Read the face before you measure. Skip it for a machined fit.
The top pick is the Mitutoyo 505-732 listing at about £86.71, and only if the seller matches Mitutoyo’s own description. That listing states 0.002 in and 198 g, while Mitutoyo UK’s shop page states a millimetre error and 176 g. The best value is the Standard Gage stainless dial at about £45.99, with a stated 0.02 mm resolution and ±0.02 mm. The Hyuduo plastic dial at about £12.71 is the row to skip for a machined metric size, because UK reviews often report an inch face. None of this is a laboratory test.
Mitutoyo 505-732 dial caliper
Top pick only when the seller matches Mitutoyo’s own 505-732 description: about £86.71, 4.6 from 149 reviews, with reviews describing a 0.01 mm dial.
Standard Gage dial caliper, 150 mm
Best value at about £45.99 for a stainless 0–150 mm dial whose bullets state 0.02 mm and ±0.02 mm, with 4.6 from 80 reviews.
Editorial
Peter F. is the editor for DIY & tools at productscompared.co.uk. Comparisons in this category are checked against amazon.co.uk listings, review evidence and public UK sources.
Guides on what to look for, how to use a product, and common mistakes.
Public sources listed for this comparison, checked against the 20 October 2026 shelf notes. Prices, stars and review counts for the three ASINs are the amazon.co.uk figures in that set. We did not run a lab test.
This page contains affiliate links to amazon.co.uk. If you buy through them, we may earn a commission at no extra cost to you. Prices, stars and review counts are the UK listing lines in this comparison. We did not run a lab test.
