The Importance of Torque Wrench Calibration 

 April 17, 2023

By  Mia H.

Torque wrenches are essential for achieving accurate and consistent tightening of bolts and nuts. They are commonly used in automotive, industrial, and construction applications. However, to ensure that torque wrenches are functioning properly and delivering the desired level of accuracy, they must be calibrated regularly.

Why is Torque Wrench Calibration Important? 

Accuracy and Precision

One of the main reasons why torque wrench calibration is critical is to ensure that the tool is delivering accurate and precise torque readings. Suppose a torque wrench is not calibrated correctly. In that case, it can lead to over or under-tightening of bolts and nuts, which can cause damage to equipment, create safety hazards, and compromise the integrity of the application.


Properly calibrated torque wrenches are also essential for safety reasons. Over-tightening can damage the equipment, while under-tightening can cause components to loosen or fail, posing safety risks. For example, if a bolt is not tightened sufficiently in a construction project, a structure may collapse, putting workers and the public in danger.

Cost Savings

If a tool is not calibrated correctly, it can lead to the need for rework, repairs, or replacement of equipment, all of which can be costly. On the other hand, calibrated tools can prevent such issues and save money in the long run. Regular calibration of torque wrenches can also result in cost savings.

How Usually Should You Calibrate Your Torque Wrench? 

  • Frequency of Calibration 

The calibration frequency depends on the torque wrench's usage and the manufacturer's recommendations. Generally, torque wrenches should be calibrated at least once a year, but if a tool is used frequently or exposed to harsh conditions, it may require more frequent calibration.

  • Factors that Can Affect Calibration 

A few factors can affect the calibration of a torque wrench, such as exposure to temperature extremes, shock or impact damage, and over-tightening or under-tightening of bolts.

How to Calibrate a Torque Wrench? 

Required Tools and Equipment

You will need a torque tester or a torque sensor, a calibration certificate, and a torque wrench manual to calibrate a torque wrench.

Step-by-Step Procedure

  • Set up the torque tester or sensor according to the manufacturer's instructions. 
  • Set the torque wrench to the chosen torque value.
  • Apply the torque to the tester or detector and record the reading.
  • Compare the recorded value to the desired torque value.
  • Adjust the torque wrench until the recorded value matches the desired value.
  • Record the calibration result and attach the calibration certificate to the tool. 

Benefits of Calibrating Your Torque Wrench 

1. Improved Accuracy and Precision

Calibrating a torque wrench ensures that it delivers accurate and precise torque readings, which is essential for achieving the desired tightening torque and preventing damage or safety hazards.

2. Extended Tool Life

Regular calibration can help prolong the life of a torque wrench by detecting and correcting any issues before they cause significant damage.

3. Compliance with Industry Standards 

Many industries have standards and regulations regarding torque wrench calibration, and failure to comply can result in legal or regulatory consequences.

4. Avoidance of Safety Hazards

Properly calibrated torque wrenches help avoid safety hazards caused by over or under-tightening of bolts, which can cause equipment damage or personal injury.


Calibrating your torque wrench regularly is essential for achieving accurate and consistent tightening of bolts and nuts, preventing damage or safety hazards, and ensuring compliance with industry standards. By following the recommended frequency of calibration, being aware of factors that can affect calibration, and performing the calibration procedure correctly, you can maintain your torque wrench's accuracy and precision and avoid costly mistakes.


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