Toll-Free: 877-761-0322 Monday through Friday from 8am to 4pm MST

Calibration Weights:
Single Calibration Weights & Weight Sets

jump down to products

We carry a wide variety of calibration weights and calibration weight sets in several classes. Use these calibration weights to calibrate an inaccurate scale, or just to make sure your scale is “right on the money”. We have a good range of masses in weight tolerance classes OIML E2, OIML F1, OIML M2, and ASTM classes 0, 1, 2, 3, 4 and 6.

If you're here for just a single weight, narrow your results by choosing the single calibration weight subcategory below. If ya need more than one weight, ya might save some money by choosing a set of calibration weights. They have their own subcategory, too.

Subcategories

Products 1-48 of 144
Show
(6)
M2 Calibration Weight - 1 gram
Retail: $4.99
Old Will's Price: $3.50
Availability: In Stock
My Weigh Item #: CAL-1G -

OIML Class M2 Calibration Weight.
(item received may differ from image)

Learn More
M2 Calibration Weight - 10 gram
Retail: $4.99
Old Will's Price: $3.50
Availability: In Stock
My Weigh Item #: CAL-10G -

OIML Class M2 Calibration Weight.
(item received may differ from image)

Learn More
(22)
M2 Calibration Weight - 100 gram
Retail: $5.99
Old Will's Price: $3.50
Availability: In Stock
My Weigh Item #: CAL-100G -

Digital scales come factory calibrated, but there's a chance they can fall out of calibration during shipping or after use. Use this OIML Class M2 100g calibration weight to test and calibrate your digital scale, so ya know it's nice and accurate.

Learn More
(1)
M2 Calibration Weight - 20 gram
Retail: $5.99
Old Will's Price: $3.50
Availability: In Stock
My Weigh Item #: CAL-20G -

OIML Class M2 Calibration Weight.
(item received may differ from image)

Learn More
(2)
M2 Calibration Weight - 5 gram
Retail: $4.99
Old Will's Price: $3.50
Availability: In Stock
My Weigh Item #: CAL-5G -

OIML Class M2 Calibration Weight.
(item received may differ from image)

Learn More
(5)
M2 Calibration Weight - 50 gram
Retail: $5.99
Old Will's Price: $3.50
Availability: In Stock
My Weigh Item #: CAL-50G -

OIML Class M2 Calibration Weight.
(item received may differ from image)

Learn More
M2 Calibration Weight - 150 gram
Retail: $8.99
Old Will's Price: $4.50
Availability: In Stock
My Weigh Item #: CAL-150G -

OIML Class M2 Calibration Weight.
(item received may differ from image)

Learn More
(11)
M2 Calibration Weight - 200 gram
Retail: $11.99
Old Will's Price: $6.50
Availability: In Stock
My Weigh Item #: CAL-200G -

OIML Class M2 Calibration Weight.
(item received may differ from image)

Learn More
(5)
M2 Calibration Weight - 300 gram
Retail: $13.99
Old Will's Price: $8.50
Availability: In Stock
My Weigh Item #: CAL-300G -

OIML Class M2 Calibration Weight.
(item received may differ from image)

Learn More
(9)
M2 Calibration Weight - 500 gram
Retail: $21.99
Old Will's Price: $12.50
Availability: In Stock
My Weigh Item #: CAL-500G -

OIML Class M2 Calibration Weight.
(item received may differ from image)

Learn More
(5)
M2 Calibration Weight - 1000 gram
Retail: $27.99
Old Will's Price: $15.90
Availability: In Stock
My Weigh Item #: CAL-1000G -

OIML Class M2 Calibration Weight.
(item received may differ from image)

Learn More
(4)
17 Piece - Class M2 - Calibration Weight Set
Retail: $28.99
Old Will's Price: $16.50
Availability: In Stock
My Weigh Item #: CALWTSET-RED-707 -

Weights included: 100g, 50g, 20g( x2 ), 10g, 5g, 2g( x2 ), 1g, 500mg, 200mg( x2 ), 100mg, 50mg, 20mg( x2 ), 10mg

Learn More
(3)
M2 Calibration Weight - 2000 gram
Retail: $35.99
Old Will's Price: $22.50
Availability: In Stock
My Weigh Item #: CAL-2000G -

OIML Class M2 Calibration Weight.
(item received may differ from image)

Learn More
F1 Calibration Weight - 1 milligram
Retail: $88.00
Old Will's Price: $31.50
Availability: In Stock
Ohaus Item #: OHAUS-F1-1MG -

OIML Class F1 ISO Compliant Calibration Weight with or without NVLAP certificate.
(item received may differ from image)

Learn More
F1 Calibration Weight - 10 milligram
Retail: $88.00
Old Will's Price: $31.50
Availability: In Stock
Ohaus Item #: OHAUS-F1-10MG -

OIML Class F1 ISO Compliant Calibration Weight with or without NVLAP certificate.
(item received may differ from image)

Learn More
F1 Calibration Weight - 100 milligram
Retail: $88.00
Old Will's Price: $31.50
Availability: In Stock
Ohaus Item #: OHAUS-F1-100MG -

OIML Class F1 ISO Compliant Calibration Weight with or without NVLAP certificate.
(item received may differ from image)

Learn More
F1 Calibration Weight - 2 milligram
Retail: $88.00
Old Will's Price: $31.50
Availability: In Stock
Ohaus Item #: OHAUS-F1-2MG -

OIML Class F1 ISO Compliant Calibration Weight with or without NVLAP certificate.
(item received may differ from image)

Learn More
F1 Calibration Weight - 20 milligram
Retail: $88.00
Old Will's Price: $31.50
Availability: In Stock
Ohaus Item #: OHAUS-F1-20MG -

OIML Class F1 ISO Compliant Calibration Weight with or without NVLAP certificate.
(item received may differ from image)

Learn More
F1 Calibration Weight - 200 milligram
Retail: $88.00
Old Will's Price: $31.50
Availability: In Stock
Ohaus Item #: OHAUS-F1-200MG -

OIML Class F1 ISO Compliant Calibration Weight with or without NVLAP certificate.
(item received may differ from image)

Learn More
(1)
F1 Calibration Weight - 5 milligram
Retail: $88.00
Old Will's Price: $31.50
Availability: In Stock
Ohaus Item #: OHAUS-F1-5MG -

OIML Class F1 ISO Compliant Calibration Weight with or without NVLAP certificate.
(item received may differ from image)

Learn More
F1 Calibration Weight - 50 milligram
Retail: $88.00
Old Will's Price: $31.50
Availability: In Stock
Ohaus Item #: OHAUS-F1-50MG -

OIML Class F1 ISO Compliant Calibration Weight with or without NVLAP certificate.
(item received may differ from image)

Learn More
F1 Calibration Weight - 500 milligram
Retail: $88.00
Old Will's Price: $31.50
Availability: In Stock
Ohaus Item #: OHAUS-F1-500MG -

OIML Class F1 ISO Compliant Calibration Weight with or without NVLAP certificate.
(item received may differ from image)

Learn More
ASTM Class 4 Calibration Weight - 1 milligram
Retail: $113.00
Old Will's Price: $33.30
Availability: In Stock
Ohaus Item #: OHAUS-ASTM4-1MG -

ASTM Class 4 Calibration Weight with or without NVLAP certificate.
(item received may differ from image)

Learn More
ASTM Class 4 Calibration Weight - 10 milligram
Retail: $113.00
Old Will's Price: $33.30
Availability: In Stock
Ohaus Item #: OHAUS-ASTM4-10MG -

ASTM Class 4 Calibration Weight with or without NVLAP certificate.
(item received may differ from image)

Learn More
ASTM Class 4 Calibration Weight - 100 milligram
Retail: $113.00
Old Will's Price: $33.30
Availability: In Stock
Ohaus Item #: OHAUS-ASTM4-100MG -

ASTM Class 4 Calibration Weight with or without NVLAP certificate.
(item received may differ from image)

Learn More
ASTM Class 4 Calibration Weight - 2 milligram
Retail: $113.00
Old Will's Price: $33.30
Availability: In Stock
Ohaus Item #: OHAUS-ASTM4-2MG -

ASTM Class 4 Calibration Weight with or without NVLAP certificate.
(item received may differ from image)

Learn More
ASTM Class 4 Calibration Weight - 20 milligram
Retail: $113.00
Old Will's Price: $33.30
Availability: In Stock
Ohaus Item #: OHAUS-ASTM4-20MG -

ASTM Class 4 Calibration Weight with or without NVLAP certificate.
(item received may differ from image)

Learn More
ASTM Class 4 Calibration Weight - 200 milligram
Retail: $113.00
Old Will's Price: $33.30
Availability: In Stock
Ohaus Item #: OHAUS-ASTM4-200MG -

ASTM Class 4 Calibration Weight with or without NVLAP certificate.
(item received may differ from image)

Learn More
ASTM Class 4 Calibration Weight - 5 milligram
Retail: $113.00
Old Will's Price: $33.30
Availability: In Stock
Ohaus Item #: OHAUS-ASTM4-5MG -

ASTM Class 4 Calibration Weight with or without NVLAP certificate.
(item received may differ from image)

Learn More
ASTM Class 4 Calibration Weight - 50 milligram
Retail: $113.00
Old Will's Price: $33.30
Availability: In Stock
Ohaus Item #: OHAUS-ASTM4-50MG -

ASTM Class 4 Calibration Weight with or without NVLAP certificate.
(item received may differ from image)

Learn More
ASTM Class 4 Calibration Weight - 500 milligram
Retail: $113.00
Old Will's Price: $33.30
Availability: In Stock
Ohaus Item #: OHAUS-ASTM4-500MG -

ASTM Class 4 Calibration Weight with or without NVLAP certificate.
(item received may differ from image)

Learn More
Ohaus 500 Gram ASTM 6 Slotted Weight 80850148,slotted
Retail: $43.00
Old Will's Price: $38.70
Availability: In Stock
Ohaus Item #: OHAUS-80850148 -

Ohaus 500 Gram ASTM 6 Slotted Weight

Learn More
ASTM Class 3 Calibration Weight - 50 gram
Retail: $50.00
Old Will's Price: $45.50
Availability: In Stock
Adam Item #: ADAM-ASTM-3-50G -

Digital scales come factory calibrated, but there's a chance they can fall out of calibration during shipping or after use. Use this ASTM Class 3 50g calibration weight to test and calibrate your digital scale, so ya know it's nice and accurate.

Learn More
E2 Calibration Weight - 1 milligram
Retail: $125.00
Old Will's Price: $46.80
Availability: In Stock
Ohaus Item #: OHAUS-E2-1MG -

OIML Class E2 Calibration Weight with or without NVLAP certificate.
(item received may differ from image)

Learn More
E2 Calibration Weight - 10 milligram
Retail: $125.00
Old Will's Price: $46.80
Availability: In Stock
Ohaus Item #: OHAUS-E2-10MG -

OIML Class E2 Calibration Weight with or without NVLAP certificate.
(item received may differ from image)

Learn More
E2 Calibration Weight - 100 milligram
Retail: $125.00
Old Will's Price: $46.80
Availability: In Stock
Ohaus Item #: OHAUS-E2-100MG -

OIML Class E2 Calibration Weight with or without NVLAP certificate.
(item received may differ from image)

Learn More
E2 Calibration Weight - 2 milligram
Retail: $125.00
Old Will's Price: $46.80
Availability: In Stock
Ohaus Item #: OHAUS-E2-2MG -

OIML Class E2 Calibration Weight with or without NVLAP certificate.
(item received may differ from image)

Learn More
E2 Calibration Weight - 20 milligram
Retail: $125.00
Old Will's Price: $46.80
Availability: In Stock
Ohaus Item #: OHAUS-E2-20MG -

OIML Class E2 Calibration Weight with or without NVLAP certificate.
(item received may differ from image)

Learn More
E2 Calibration Weight - 200 milligram
Retail: $125.00
Old Will's Price: $46.80
Availability: In Stock
Ohaus Item #: OHAUS-E2-200MG -

OIML Class E2 Calibration Weight with or without NVLAP certificate.
(item received may differ from image)

Learn More
E2 Calibration Weight - 5 milligram
Retail: $125.00
Old Will's Price: $46.80
Availability: In Stock
Ohaus Item #: OHAUS-E2-5MG -

OIML Class E2 Calibration Weight with or without NVLAP certificate.
(item received may differ from image)

Learn More
E2 Calibration Weight - 50 milligram
Retail: $125.00
Old Will's Price: $46.80
Availability: In Stock
Ohaus Item #: OHAUS-E2-50MG -

OIML Class E2 Calibration Weight with or without NVLAP certificate.
(item received may differ from image)

Learn More
E2 Calibration Weight - 500 milligram
Retail: $125.00
Old Will's Price: $46.80
Availability: In Stock
Ohaus Item #: OHAUS-E2-500MG -

OIML Class E2 Calibration Weight with or without NVLAP certificate.
(item received may differ from image)

Learn More
ASTM Class 4 Calibration Weight - 1 gram
Retail: $129.00
Old Will's Price: $48.60
Availability: In Stock
Ohaus Item #: OHAUS-ASTM4-1G -

ASTM Class 4 Calibration Weight with or without NVLAP certificate.
(item received may differ from image)

Learn More
ASTM Class 4 Calibration Weight - 2 gram
Retail: $131.00
Old Will's Price: $48.60
Availability: In Stock
Ohaus Item #: OHAUS-ASTM4-2G -

ASTM Class 4 Calibration Weight with or without NVLAP certificate.
(item received may differ from image)

Learn More
ASTM Class 4 Calibration Weight - 5 gram gram calibration weight,astm class 4,nvlap
Retail: $134.00
Old Will's Price: $48.60
Availability: In Stock
Ohaus Item #: OHAUS-ASTM4-5G -

ASTM Class 4 Calibration Weight with or without NVLAP certificate.
(item received may differ from image)

Learn More
M2 Calibration Weight - 5000 gram
Retail: $85.99
Old Will's Price: $49.40
Availability: Out of Stock
My Weigh Item #: CAL-5000G -

OIML Class M2 Calibration Weight.
(item received may differ from image)

Learn More
(1)
ASTM Class 2 Calibration Weight - 100 gram
Retail: $65.00
Old Will's Price: $52.00
Availability: In Stock
Adam Item #: ADAM-ASTM-2-100G -

Digital scales come factory calibrated, but there's a chance they can fall out of calibration during shipping or after use. Use this ASTM Class 2 100g calibration weight to test and calibrate your digital scale, so ya know it's nice and accurate.

Learn More
ASTM Class 3 Calibration Weight - 200 gram
Retail: $65.00
Old Will's Price: $52.00
Availability: In Stock
Adam Item #: ADAM-ASTM-3-200G -

Digital scales come factory calibrated, but there's a chance they can fall out of calibration during shipping or after use. Use this ASTM Class 3 200g calibration weight to test and calibrate your digital scale, so ya know it's nice and accurate.

Learn More

We know you have a choice when you buy scales online. Just know that when you buy digital scales from Old Will, it's always a "Worry Free Deal".