Calipers

Calipers are instruments with adjustable tips that measure length or distance between an object’s opposite sides with a high degree of accuracy. Used in physics labs, machine shops and engineering applications, types include the Vernier caliper and digital caliper, but the principle of measuring remains the same. Some can provide a reading to the nearest 0.02 millimetres.

What are the main features of calipers?

They’re robust and commonly made from stainless steel. Some only measure the inside, outside, depth or step of an object, but many measure all of these. Calipers can display both imperial and metric measurements, with some featuring an anti-glare or satin finish to make them easier to read.

What are the different types of calipers?

Calipers vary by what they measure and how they can be read. The main types are:

Vernier caliper: Named after their inventor the French mathematician Pierre Vernier, Vernier calipers use a fixed main scale and a moving Vernier scale as a visual aid for measuring between two markings on a linear scale. Particularly useful when measuring something round, the main scale is normally in tenths of an inch or millimetres while the Vernier scale measures to the nearest 0.02 millimetres or 0.001 inches.

Dial caliper: These calipers provide the same level of accuracy as Vernier calipers but use a dial to read the final fraction of an inch or millimetre instead of two scales. Dial calipers are easy to read accurately.

Digital caliper: The digital caliper uses linear encoders to measure internal and external distances. This is shown on a digital display and available with metric and imperial conversions to accurately measure objects with ease.

Spring Caliper: The primary purpose of spring calipers is to measure the internal and external diameter of an object. They differentiate by the measuring edges and get their name by the spring joint that loads onto the nut. You can turn the adjuster clockwise or anti-clockwise to adjust the size of the measuring tips.

Find out more in our Complete Guide to Calipers.

Where are calipers used?

Calipers are found in industrial applications from mechanical engineering and metalworking to medicine and science.


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Description Price Caliper Type Capacity Imperial or Metric Display Type Accuracy Resolution
RS Stock No. 725-5715
BrandRS PRO
SGD137.88
Each
units
Dial 200mm Metric Analogue ±0.03 mm 0.02 mm
RS Stock No. 136-8103
BrandRS PRO
SGD253.65
Each
units
Digital 150mm Both Digital - 0.01 mm
RS Stock No. 136-8085
BrandRS PRO
SGD229.65
Each
units
Vernier 300mm Both Analogue ±0.04 mm -
RS Stock No. 146-5499
BrandRS PRO
SGD21.53
Each
units
Vernier 80mm Both - 0.1 mm -
RS Stock No. 136-8102
BrandRS PRO
SGD285.40
Each
units
Digital 150mm Both Digital - 0.01 mm
RS Stock No. 683-0703
BrandRS PRO
SGD25.59
Each
units
Jenny 175mm Both None - -
RS Stock No. 683-0719
BrandRS PRO
SGD35.61
Each
units
Spring 100mm Metric None - -
RS Stock No. 136-8086
BrandRS PRO
SGD283.50
Each
units
Vernier 600mm Both Analogue ±0.04 mm -
RS Stock No. 245-5676
Mfr. Part No.500-196-30
BrandMitutoyo
SGD165.73
Each
units
Digital 150mm Both Digital ±0.02 mm 0.01 mm
RS Stock No. 397-6641
Mfr. Part No.530-122
BrandMitutoyo
SGD79.23
Each
units
Vernier 150mm Metric Analogue ±0.03 mm 0.02 mm
RS Stock No. 574-359
Mfr. Part No.500-173
BrandMitutoyo
SGD805.98
Each
units
Digital 300mm Both Digital ±0.03 mm 0.01 mm
RS Stock No. 374-109
Mfr. Part No.500-172-30
BrandMitutoyo
SGD544.77
Each
units
Digital 200mm Both Digital ±0.02 mm 0.01 mm
RS Stock No. 432-025
Mfr. Part No.500-171-30
BrandMitutoyo
SGD368.40
Each
units
Digital 150mm Both Digital ±0.001 in 0.01 mm
RS Stock No. 224-5457
Mfr. Part No.DW990
BrandStarrett
SGD42.65
Each
units
Vernier 150mm Metric Analogue ±0.02 mm -
RS Stock No. 224-5429
Mfr. Part No.DW851
BrandStarrett
SGD32.65
Each
units
Spring 150mm Metric - - -
RS Stock No. 300-9959
Mfr. Part No.816
BrandFacom
SGD180.14
Each
units
Vernier 150mm Metric Analogue ±0.05 mm -
RS Stock No. 669-8195
Mfr. Part No.1300EA
BrandFacom
SGD193.94
Each
units
Digital 150mm Both Digital ±0.01 mm 0.01 mm
RS Stock No. 224-5441
Mfr. Part No.DW852
BrandStarrett
SGD53.02
Each
units
Spring 150mm Metric None - -
RS Stock No. 224-5413
Mfr. Part No.DW850
BrandStarrett
SGD47.95
Each
units
Spring 150mm Metric - - -
RS Stock No. 486-8276
Mfr. Part No.500-752-20
BrandMitutoyo
SGD327.44
Each
units
Digital 150mm Both Digital ±0.02 mm 0.01 mm
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