How to Calibrate Your Digital Torque Wrench 

 June 2, 2023

By  Mia H.

Calibrating your digital torque wrench is crucial to ensure accurate torque measurements and maintain the tool's reliability. This guide will explore step-by-step instructions on calibrating your digital torque wrench effectively. By following these steps, you can ensure precise torque application for your projects, prevent under or over-tightening, and maintain the quality of your work.  

Tools and Equipment Needed 

Before you begin calibrating your digital torque wrench, make sure you have the following tools and equipment at hand:  

  • Known loads or weights  
  • Bench vise or torque calibration fixture  
  • Screwdriver or torque adjustment tool  
  • Calibration standards (optional but recommended for increased accuracy) Using high-quality tools and equipment is essential for accurate calibration and reliable torque measurements.  

Step-by-Step Guide for Calibrating Your Digital Torque Wrench 

1. Preparation 

  • Gather all the required tools and equipment.  
  • Choose a clean and well-lit workspace.  
  • Ensure the torque wrench is clean and free from debris.  

2. Setting Up the Torque Wrench 

  • Attach the appropriate socket or attachment to the torque wrench.  
  • Set the torque wrench to the lowest torque setting.  

3. Zeroing the Torque Wrench  

  • Place the torque wrench in the calibration fixture or bench vise.  
  • Apply no load or torque to the wrench.  
  • Adjust the wrench to zero on the digital display.  

4. Applying Known Loads for Calibration 

  • Apply the first known load to the torque wrench.  
  • Slowly and steadily apply torque until the desired load is reached.  
  • Take note of the torque value displayed on the digital screen.  
  • Repeat this process for multiple known loads.  

5. Adjusting the Torque Wrench  

  • Compare the torque values displayed on the wrench with the known load values.  
  • If the displayed value differs from the known value, use a screwdriver or torque adjustment tool to make appropriate adjustments.  
  • Follow the manufacturer's instructions for adjusting the torque wrench.  

6. Repeating the Calibration Process 

  • Repeat the calibration process at least three times to ensure consistency and accuracy.  
  • Make necessary adjustments each time based on the differences observed.  
  • Continue until the torque wrench consistently displays accurate torque values.  

Tips for Accurate Calibration 

1. Calibrating Regularly 

Regular calibration ensures the torque wrench maintains accuracy over time. Aim to calibrate your digital torque wrench more than once a year or as the manufacturer recommends.  

2. Using Appropriate Standards 

If available, use calibration standards that match your torque wrench's range and accuracy requirements. It can further enhance the precision of your calibration process.  

3. Performing Calibration in a Controlled Environment 

Calibrate the torque wrench in an environment with stable temperature and humidity conditions. Extreme variations can affect the accuracy of the calibration.  

4. Keeping Calibration Records 

Maintain a record of each calibration session, including the date, results, and any adjustments made. This documentation will help you track the history of your torque wrench's calibration and identify any trends or issues.  


Calibrating your digital torque wrench is vital for accurate measurements and optimal performance. By following the step-by-step guide in this article and implementing the suggested tips, you can ensure precise torque application, improve your work's quality, and extend your torque wrench's lifespan. Remember to calibrate regularly and maintain proper documentation to keep your torque wrench in top-notch condition.


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