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. 732-482
Mfr. Part No.532-120
BrandMitutoyo
SGD206.67
Each
units
Vernier 180mm Both Analogue ±0.03 mm 0.02 mm
RS Stock No. 833-6449
Mfr. Part No.500-181-30
BrandMitutoyo
SGD209.02
Each
units
Digital 150mm Metric Digital ±0.02 mm -
RS Stock No. 268-9100
Mfr. Part No.DW8495
BrandStarrett
SGD36.69
Each
units
Spring 150mm Metric None - -
RS Stock No. 486-8305
Mfr. Part No.505-671
BrandMitutoyo
SGD274.67
Each
units
Dial 150mm Both Analogue ±0.03 mm 0.02 mm
RS Stock No. 833-6451
Mfr. Part No.500-162-30
BrandMitutoyo
SGD361.70
Each
units
Digital 200mm Metric Digital ±0.02 mm -
RS Stock No. 794-3604
Mfr. Part No.500-445
BrandMitutoyo
SGD465.83
Each
units
Digital 200mm Metric Digital ±0.02 mm 0.01 mm
RS Stock No. 353-3727
Mfr. Part No.700-118-30
BrandMitutoyo
SGD318.63
Each
units
Digital 12mm Both Digital ±0.02 mm 0.01 mm
RS Stock No. 664-6081
Mfr. Part No.500-706-20
BrandMitutoyo
SGD401.35
Each
units
Digital 150mm Metric Digital ±0.02 mm 0.01 mm
RS Stock No. 268-9093
Mfr. Part No.DW849
BrandStarrett
SGD45.14
Each
units
Spring 100mm Both None - -
RS Stock No. 548-710
Mfr. Part No.532-119
BrandMitutoyo
SGD152.84
Each
units
Vernier 130mm Both Analogue ±0.03 mm 0.02 mm
RS Stock No. 732-498
Mfr. Part No.532-121
BrandMitutoyo
SGD602.62
Each
units
Vernier 280mm Both Analogue ±0.04 mm 0.02 mm
RS Stock No. 795-9987
Mfr. Part No.572-601
BrandMitutoyo
SGD560.82
Each
units
Digital 150mm Metric Digital 0.03 mm 0.01 mm
RS Stock No. 486-8311
Mfr. Part No.505-731
BrandMitutoyo
SGD320.33
Each
units
Dial 200mm Both Analogue ±0.03 mm 0.02 mm
RS Stock No. 205-876
Mfr. Part No.500-457
BrandMitutoyo
SGD263.31
Each
units
Digital 150mm Metric Digital ±0.02 mm 0.01 mm
RS Stock No. 794-3623
Mfr. Part No.551-331-10
BrandMitutoyo
SGD770.90
Each
units
Digital 300mm Metric Digital 0.04 mm 0.01 mm
RS Stock No. 794-3614
Mfr. Part No.500-727-11
BrandMitutoyo
SGD778.21
Each
units
Digital 150mm Metric Digital ±0.02 mm 0.01 mm
RS Stock No. 795-9978
Mfr. Part No.572-600
BrandMitutoyo
SGD524.29
Each
units
Digital 100mm Metric Digital 0.03 mm 0.01 mm
RS Stock No. 794-7782
Mfr. Part No.805.1
BrandFacom
SGD229.10
Each
units
Vernier 150mm Both Analogue 0.02 mm 0.02 mm
RS Stock No. 224-5362
Mfr. Part No.DW900
BrandStarrett
SGD163.81
Each
units
Dial 150mm Metric Analogue ±0.02 mm -
RS Stock No. 268-9138
Mfr. Part No.DW8517
BrandStarrett
SGD46.22
Each
units
Spring 150mm Both None - -