Calculators we built for our own works office and then put on the website, because the same questions come up in nearly every enquiry. Free to use, no sign-up, and each one shows the formula and the standard it comes from rather than just a number.
Weight per piece and for the whole lot, using either trade weights or a head-plus-shank calculation. Enter your own dimensions for non-standard parts. Useful for costing, freight and packing lists.
Open calculatorTightening torque from proof load and nut factor, adjusted for coating and lubrication. Shows the range as well as the figure, because a galvanised bolt and a waxed one behave very differently on the wrench.
Open calculatorRod weight plus every welded item on the assembly, itemised and totalled for the lot. Takes the length either way a drawing states it, and resolves pipe by nominal bore and class.
Open calculatorWeight per piece and for the lot for any size, length and quantity, with full charts for every standard length. Head size, Allen key and thread figures are included, so non-standard lengths can be worked out too.
Open chartWeight per piece and per consignment for headed shear studs, and stud quantity for a beam layout with spacing checked against EN 1994-1-1 and IS 11384. Downloads a one-page statement you can attach to a bill of quantities.
Open calculatorIf there is a calculation you keep doing by hand, tell us and we will look at adding it. Send a message.
Alongside the calculators, our product data sheets carry dimension and weight tables you can download: HSFG bolts, HSFG nuts, IS 6649 washers, DTI washers to EN 14399-9, shear connector studs and PSR studs.
Technical articles covering the standards behind these numbers are on the articles page — bolt material grades, HSFG standards, tunnel segment bolt thread forms and B7 stud bolts for oil and gas.
Everything here is general engineering guidance calculated from published standard dimensions and properties. Real parts vary with tolerance, coating thickness, thread condition and manufacturing method. Where a drawing, specification or design engineer states a value, that value governs. We are a manufacturer, not a design consultancy, and these tools are not a substitute for design calculations.