Buy calibration weights and test weights

Calibration weights, test weights and check weights to OIML R111, from 1 mg to 2,000 kg: E1 and E2 for analytical balances, F1 and F2 for precision balances, and M1, M2 and M3 for industrial scales. Prices are shown per version. Weights in classes F1 to M3 are available with a calibration certificate from our own laboratory.

Choose a type of weight

Weight sets

Weight sets

33 products
Knob and cylindrical weights

Knob and cylindrical weights

25 products

Milligram weights

9 products
Block weights

Block weights

13 products
Heavy weights and mass pieces

Heavy weights and mass pieces

3 products

Slotted and hook weights

5 products
Cases and accessories

Cases and accessories

23 products
Calibration tables

Calibration tables

1 product

Or choose by OIML class

The class determines how much a weight may deviate. The weight must be more accurate than the scale you check with it: the error of the weight should be at most one third of the error the scale is allowed at that load.

E1 10 products E2 13 products F1 17 products F2 9 products M1 30 products M2 5 products M3 7 products

Or choose by brand

KERN weights 91 products: individual weights, weight sets and accessories View KERN weights →

Which weight do you need?

Test weight, check weight or calibration weight: in practice they are the same thing, a weight of known mass in an OIML class. Four choices determine what you order.

1. The OIML class

The class follows from your scale: E2 for analytical balances, F1 or F2 for precision balances and M1 for most bench, floor and pallet scales. Use our guide to choosing a calibration weight to check; the tolerances are in our explanation of the OIML classes.

2. Knob weight or block weight

Knob weights are used on balances and bench scales. Stackable block weights are the standard for floor and pallet scales, and heavy weights for weighbridges and crane scales.

3. Stainless steel or cast iron

Weights in the E and F classes are always made of stainless steel. In the M classes you choose between robust, economical cast iron and low-maintenance stainless steel. Read more in cast iron or stainless steel weights.

4. Single weight or weight set

If you always check the same load, a single weight is enough. With a weight set you check a scale at several points of its range. Read what the names mean in test weight or calibration weight.

Prices shown directly

The price excl. VAT is shown per version. Use the quote basket to request a quote for everything you need in one go.

Certificate from our own laboratory

Weights in classes F1 to M3 are available with a traceable calibration certificate from our laboratory. We also carry out weight calibration and recalibration ourselves.

Advice on the right class

Not sure which class or range suits your scale? Call us on +31 345 786 553; our specialists calibrate scales and weights every day.

Prefer to hire weights?

Do you only need weights temporarily, for example for a crane test or checking a weighbridge? Then hire calibrated weights from us, transport included.

Hire weights Contact us
View basket →