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Top rated calibration weights

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Top rated calibration weights

AI-generated summary · updated July 27, 2026 · verify details before purchase.

  1. Best overall

    OHAUS Scout SPX222 220g x 0.01g Precision Balance

    4.6/5 $350-$420

    A reliable precision balance with excellent readability and durability, ideal for lab and industrial use. Its fast stabilization time and multiple weighing modes add versatility.

    • High accuracy
    • Durable build
    • Fast stabilization
    • Slightly expensive
    • No internal calibration
    View on Amazon
  2. Best budget pick

    American Weigh GEMINI-20 Portable Precision Scale

    4.5/5 $25-$30

    An affordable and portable 20g x 0.001g scale with backlit display and calibration weights included. Perfect for jewelry or reloading.

    • Budget price
    • Includes calibration weight
    • Portable
    • Small capacity
    • Not for heavy use
    View on Amazon
  3. Best for industrial scales

    Rice Lake 270-10-10-1 10lb Calibration Weight, Class F

    4.7/5 $30-$40

    A rugged cast-iron weight with a handle, accurate to Class F tolerance. Commonly used in commercial and industrial scale verification.

    • Heavy-duty
    • Accurate to Class F
    • Easy grip handle
    • Not for precision lab balances
    • Single weight
    View on Amazon
  4. Best for lab balances

    OHAUS 30390578 500g Calibration Weight, ASTM Class 2

    4.8/5 $40-$55

    High-precision 500g weight with ASTM Class 2 certification, comes in a protective case. Ideal for calibrating analytical and precision balances.

    • High precision
    • Certified ASTM Class 2
    • Comes with case
    • Pricey for single weight
    • Limited to 500g
    View on Amazon
  5. Best weight set

    Heraeus Electro-Nite Calibration Weight Set, 1g-100g

    4.4/5 $50-$70

    A comprehensive set of 13 weights from 1g to 100g, with a wooden case. Suitable for calibrating a range of balances in educational or light industrial settings.

    • Complete set
    • Comes with case
    • Good value
    • Plastic case fragile
    • Not Class 1 precision
    View on Amazon
  6. Best for hanging scales

    NSI Industries 98-450 5-Pound Calibration Weight

    4.5/5 $12-$18

    A simple 5-pound weight with a hook for calibrating hanging or spring scales. Rugged iron construction and low cost.

    • Low cost
    • Includes hook
    • Durable
    • Only 5 lb
    • Not for precision balances
    View on Amazon
  7. Best portable precision

    Adam Equipment PGL 2002 Portable Precision Balance

    4.3/5 $250-$300

    A 2000g x 0.01g portable balance with rechargeable battery and auto-calibration. Good for field use with reliable accuracy.

    • Portable with battery
    • Auto-calibration
    • Large capacity
    • Higher price
    • Plastic housing
    View on Amazon

Buying advice

When choosing calibration weights, consider the accuracy class (e.g., ASTM Class 1-7 or OIML) required for your scale, the weight range you need, and whether you prefer a single weight or a set. For industrial scales, Class F or cast-iron weights are cost-effective. For lab balances, invest in a certified ASTM Class 2-4 weight. Always check that the weight's tolerance matches your scale's readability. Store weights in a case to avoid damage and contamination.

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