This free stud bolt weight calculator from HAGUE FASTENERS LIMITED works out the weight of fully threaded stud bolts and nuts, for one stud or a whole order, in kilograms and pounds. It covers imperial studs from 1/2″ to 4″ with heavy hex nuts, and metric studs from M6 to M64, in carbon and alloy steel, stainless steel, duplex and nickel alloys.
Stud bolt and nut weight calculator
Fully threaded stud, weight worked out at the thread pitch diameter. Imperial nuts are heavy hex (ASME B18.2.2), metric nuts are hex style 1 (ISO 4032). Theoretical weights before coating; actual weights vary with tolerances, chamfers and finish.
Guidance only. Results are approximate and for initial guidance. They are not a substitute for the governing standard, specification or drawing, or for testing. HAGUE FASTENERS LIMITED accepts no liability for decisions made using these tools. Always check critical values against the relevant standard. © 2026 HAGUE FASTENERS LIMITED.
How to use the weight calculator
- Choose imperial (UNC and 8UN) or metric threads, then the size.
- Enter the stud length in inches or millimetres.
- Choose the number of nuts per stud, the quantity of studs and the material.
- Read the weight of each stud, each nut, each stud with its nuts, and the total for the order.
How the weight is worked out
Stud weight is worked out from the volume of a fully threaded stud at the thread pitch diameter, multiplied by the density of the material. Imperial nuts are heavy hex nuts to ASME B18.2.2, the usual partner for ASTM A193 studs with ASTM A194 2H, 4 and 7 nuts. Metric nuts are hex nuts to ISO 4032. Weights are theoretical, before coating, and real parts vary with tolerances, chamfers and finish.
Frequently asked questions
How is stud bolt length measured?
For flange studs to ASME B16.5, length is measured from first thread to first thread, not including the points. Use the same length here.
Why do I need fastener weights?
Weights help with freight costs, packing, lifting plans and checking a delivery. For export, weights are also needed on shipping and customs paperwork.
Can you make studs in exotic materials?
Yes. HAGUE FASTENERS LIMITED makes studs and nuts in alloy steels, stainless and duplex steels, Inconel, Monel, Hastelloy and other special materials, to drawing or specification. Use the quote button to send us your sizes and quantities.
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Need special fasteners made to drawing, sample or specification? Send us an enquiry or call +44 (0)1902 365 865.