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Protractor Calibration

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0 to 90º

Standards Followed:

  • Mil Std 45662A
  • GGG-P676B
  • TO33K6-4-2949-1
  • Manufacturers Specification
  • Customer Specifications


protractor alliance calibration iso 17025 accredited

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Brands we Calibrate:

  • Mitutoyo
  • SPI
  • Westward
  • Greelee
  • Empire
  • Starrett
  • General Tool
  • Johnson
  • Eastwood
  • and more

How To Use A Protractor




In Geometry, it is important to know how to measure an angle. Using a protractor helps us determine the angle measurement so we can label it as acute, right or obtuse. Every protractor is a little bit different, but all will have a location on the bottom edge where we align the vertex of the angle we are measuring. After lining up the vertex, we line up the bottom edge of the protractor with one side of the angle and use the marks on the top to measure.

Source: https://www.brightstorm.com/math/geometry/geometry-building-blocks/using-a-protractor/