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Calibration Weights

Calibration Weights are used when calibrating weighing scales and balances to ensure consistent weighing performance and accuracy. Choose from our selection calibration test weights and weight sets ranging from 1g to 50kg with stainless steel, cast iron and brass variations available.

The different test weight options available can be confusing and you might well ask what the difference is between an M1 and an F1 weight, or why you might use one rather than the other. We have compiled a brief overview of the calibration weights we offer, and additional information on the importance and how to calibrate a balance with weights within our related articles below:  

M1 Class Test Weights: The most widely used test weight class on the market today. These weights are used to calibrate scales and balances where exact precision is not necessary. All class III scales use these weights for reference and calibration.

F1 Class Test Weights: Common weights used for standard precision balances and scales. These weights have a high degree of accuracy, but more cost effective than the E1 and E2 classes. Mainly used in laboratories, calibration houses and quality control areas.

E2 Class Test Weights: The most precise test weights available. These weights should be used on balances and scales with very fine resolutions, such as micro and analytical balances. Most commonly used in test and calibration houses and within the chemical and pharmaceutical industries.

Guide to Calibration Weights - Free PDF Download

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  1. Kern M1 Class Individual Finely Turned Beam Bar Brass Calibration Test Weights

    M1 Class Individual Finely Turned Beam Bar Brass Calibration Test Weights

    Capacity Range:
    10g to 1000g

    Starting at £30.00

    Kern's individual M1 Class tuned beam bar brass calibration weight. Hanging beam bar weights can be customised with slotted weights for calibrating scales, balances and force measurement gauges. Learn More
  2. Kern M1 Class Calibration Test Weight Finely Turned Brass Wooden Box Sets

    M1 Class Calibration Test Weight Finely Turned Brass Wooden Box Sets

    Starting at £69.00

    Correctly selected test weights with calibration certificate are the pre-requisite for ensuring that your balances and scales are not only correctly adjusted, but also correctly calibrated. Scheduled testing of your balances with such test weights helps to guarantee your quality requirements and to maintain your quality targets. Learn More
  3. Kern M1 Class Individual Finely Turned Hook Brass Calibration Test Weights

    M1 Class Individual Finely Turned Hook Brass Calibration Test Weights

    Capacity Range:
    1g to 10kg

    Starting at £12.00

    Kern M1 Class Individual Finely Turned Hook Brass Calibration Test Weights. Correctly selected test weights with calibration certificate are the pre-requisite for ensuring that your balances and scales are not only correctly adjusted, but also correctly calibrated. Scheduled testing of your balances with such test weights helps to guarantee your quality requirements and to maintain your quality targets. Learn More
  4. Kern M1 Class Individual Cast Iron Block Calibration Test Weights

    M1 Class Individual Cast Iron Block Calibration Test Weights

    Capacity Range:
    5000g to 50kg

    Starting at £65.00

    M1 Class cast iron block test weights manufactured by Kern. Block test weights are used for calibrating larger, industrial scales and weighing platforms with higher weight capacities. Perfect for large industrial platforms and warehouse weighing scales. Learn More
  5. Kern F1 Class Calibration Test Weight Nickel-plated and polished Brass Wooden Box Sets

    F1 Class Calibration Test Weight Nickel-plated and polished Brass Wooden Box Sets

    Starting at £175.00

    Correctly selected test weights with calibration certificate are the pre-requisite for ensuring that your balances and scales are not only correctly adjusted, but also correctly calibrated. Scheduled testing of your balances with such test weights helps to guarantee your quality requirements and to maintain your quality targets. Learn More
  6. OIML Calibration Weight Set | Inscale UK

    OIML Calibration Weight Sets

    Starting at £113.00

    OIML weight sets are a complete set of test weights that can meet the requirements for testing to OIML standards. E2 and F1 weights offer the highest accuracy required for analytical and precision balances, M1 weights offer the lowest accuracy but are more affordable and are ideal for compact balances and bench scales. Learn More
  7. Kern F1 Class Individual Polished Stainless Steel Calibration Test Weights

    F1 Class 1g to 50kg Individual Polished Stainless Steel Calibration Test Weights

    Capacity Range:
    1g to 50kg

    Starting at £30.00

    F1 Class individual polished stainless steel calibration weights manufactured by Kern. Correctly selected test weights with calibration certificate are the pre-requisite for ensuring that your balances and scales are not only correctly adjusted, but also correctly calibrated. Scheduled testing of your balances with such test weights helps to guarantee your quality requirements and to maintain your quality targets. Learn More
  8. Kern M1 Class Milligram Calibration Test Weights

    M1 Class Milligram Calibration Test Weights

    Starting at £6.00

    Kern's M1 Class Milligram Calibration Test Weights. Correctly selected test weights with calibration certificate are the pre-requisite for ensuring that your balances and scales are not only correctly adjusted, but also correctly calibrated. Scheduled testing of your balances with such test weights helps to guarantee your quality requirements and to maintain your quality targets. Learn More
  9. Kern M1 Class Calibration Test Weight Finely Turned Stainless Steel Box Sets

    M1 Class Calibration Test Weight Finely Turned Stainless Steel Box Sets

    Starting at £69.00

    Correctly selected test weights with calibration certificate are the pre-requisite for ensuring that your balances and scales are not only correctly adjusted, but also correctly calibrated. Scheduled testing of your balances with such test weights helps to guarantee your quality requirements and to maintain your quality targets. Learn More
  10. Kern M1 Class Individual Finely Turned Slotted Brass Calibration Test Weights

    M1 Class Individual Finely Turned Slotted Brass Calibration Test Weights

    Capacity Range:
    1g to 10kg

    Starting at £14.00

    Kern's M1 Class Individual Finely Turned Slotted Brass Calibration Test Weights. These slotted weights are designed to sit on hanging beam bar calibration weights and can be used to calibrate scales and balances with an under-scale hook attachment. These weights can also be used alongside force gauges and instruments working in Newtons. Learn More
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