4 Methods of Scale Calibration Uncovered

 Accurate weighing scales are essential for every business that sells products, whether in the pharmaceutical, food and beverage, or chemical industries. Precise measurements ensure correct pricing, efficient inventory management, and regulatory compliance. But how can you be sure your scale is truly accurate? That’s where scale calibration comes in.


If you’re a business owner, you’ve probably searched for “scale calibration near me.” However, before scheduling a service, it’s crucial to understand the different methods of scale calibration available. In this blog, we’ll discuss the four methods and how each ensures your scale’s precision. Let’s begin.

What is Scale Calibration

For those who don’t know, calibration refers to the process of checking the accuracy of a scale. All weighing devices require regular calibration. Scales used in critical processes should be checked every day. The frequency can vary based on factors, such as how often the scale is used, the setting it’s used, the weighing equipment itself, and how accurate the scale is supposed to be. 

Methods of Scale Calibration

Here, we mention the 4 methods of scale calibration. 

Calibration Weights

Utilizing certified scale calibration weights or test weights is the most accurate method for calibration. Moreover, it is the only legal-for-trade method for scale calibration. When using this method for scale calibration, you should review NIST Handbook 44 to ensure you are using the correct class and amount of weight for the capacity of your scale. 

Generally, you need weights that equal 12.5% of the scale’s capacity. Some lower-capacity scales may also require weights equal to their total capacity. 

An Object from a Calibrated Scale

In the second method, you can use an accurately calibrated scale to help calibrate another one. One can use this method if calibration scales are not available. During the process, place an object on the calibrated scale and record its exact weight. Then, place the same object on the uncalibrated scale and ensure it produces the same weight reading. If needed, adjust the uncalibrated scale. The object works as a temporary substitution for calibration weights. This method is useful for scales with heavy capacity, such as truck scales. 

Material to Substitute for Weights

The third method should be used only if you don’t have enough weights to meet 12.5% of the scale’s capacity. After an initial calibration with your weights, replace them with products of materials. Then, add the calibration weights back and check if the scale is returning the expected amount of weight. You need to continue this build-up process until you pass the 12.5% required to calibrate the scale.

Calibration with a Simulator (Theoretical Calibration)

The final method is using a simulator or theoretical calibration. It is the least accurate method and is prohibited in a legal-for-trade application. After using this method, you should return to the scale with the test weight for a full calibration. It is a complex process that involves numerous calculations and has a high chance of errors.


We are Scale Sales & Service, serving business owners with scale products and services. Whether you are looking for scale calibration near me or scale calibration weight (Nebraska), we can help. It doesn’t matter if you are working with scales for the first time; we will help you throughout the process. Contact us now and book your service. 

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