ENGINEERING TOOL
M18 Threaded Rod & Stud Bolt Weight Chart
Weight per meter (M18, kg/m)
| Weight per meter |
|---|
| 1.65 kg/m |
Weight per piece by length (M18, kg/pc)
| Length L (mm) | Weight per piece |
|---|---|
| M18×100 | 0.165 |
| M18×150 | 0.248 |
| M18×200 | 0.331 |
| M18×250 | 0.413 |
| M18×300 | 0.496 |
Per-meter and per-piece weights of M18 fully threaded rod (same basis for all-thread, threaded bar and double-end stud bolts) across 100–3000 mm lengths (carbon steel, geometric-volume method), kg/m and lb/ft, with pitch, root diameter and tensile stress area — basis fully disclosed.
Full PDF
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Other sizes
Thread Data
| Coarse pitch | 2.5 mm |
| External thread minor dia. | 14.93 mm |
| Tensile stress area As | 192 mm² |
Pitch and minor diameter are public ISO metric basic-profile geometry; As is the ISO 898-1 tensile stress area used for tensile capacity calculations, not the physical cross-section.
Weight per piece by length (M18, kg/pc)
| Length L (mm) | Weight per piece |
|---|---|
| M18×100 | 0.165 |
| M18×150 | 0.248 |
| M18×200 | 0.331 |
| M18×250 | 0.413 |
| M18×300 | 0.496 |
| M18×400 | 0.661 |
| M18×500 | 0.827 |
| M18×600 | 0.992 |
| M18×800 | 1.32 |
| M18×1000 | 1.65 |
| M18×1500 | 2.48 |
| M18×2000 | 3.31 |
| M18×2500 | 4.13 |
| M18×3000 | 4.96 |
Cell shows the piece weight at that length (kg/pc, carbon steel 7.85 g/cm³, fully threaded rod modeled as a pitch-diameter cylinder d2 = d − 0.6495 × pitch P). Trade practice: 1/2/3 m standard bars or cut to length.
References
- GB/T 15389-1994 — Threaded rods (CN national standard, official full text)
- GB/T 192-2003 — General purpose metric screw threads: basic profile (CN, official full text; ISO 68-1 equivalent)
- Metric thread basic profile (ISO 68-1)
- Dimensions cross-checked against industry fastener data libraries; densities are common industry values
Material Density Conversion
Values above are carbon steel (7.85 g/cm³); for other materials multiply by the density factor.
| Material | Density (g/cm³) | Factor |
|---|---|---|
| Carbon / Alloy Steel | 7.85 | ×1.000 |
| Stainless 304 | 7.93 | ×1.010 |
| Stainless 316 | 7.98 | ×1.017 |
| Brass | 8.5 | ×1.083 |
Basis of Calculation & Disclosed Assumptions
Calculation basis
- All values are computed size by size as geometric volume × density (carbon steel 7.85 g/cm³, base metal, coating excluded).
- Fully threaded rod = pitch-diameter cylinder π/4·d2²·L, with d2 = d − 0.6495 × pitch P (ISO metric basic profile — the effective section of rolled or cut threads; identical formula and parameters as the online weight calculator).
- The plain full-diameter figure is 1.998 kg/m; this chart's pitch-diameter basis is about (d2/d)² of it.
Scope & limits
- Theoretical geometric estimates for quotation, freight and lifting budgets; use measured values for trade settlement.
- Actual piece weight varies with thread tolerance and coating (hot-dip galvanizing ≈ +4.5%). Double-end studs are cut-to-length products — at the same diameter and length the piece weight matches threaded rod.
- Theoretical estimate tolerance ±5%.
Cite this chart
YAXIIO. M18 Threaded Rod & Stud Bolt Weight Chart. https://www.yaxiio.com/en/tools/threaded-rod-weight-chart/m18 (accessed 2026-10-29).
Free to cite and embed — attribution required: “YAXIIO” + a link to this page.
FAQ
Are threaded rod and stud bolt weights the same thing?
Yes. A double-end stud bolt is threaded rod (all-thread / threaded bar) cut to a fixed length, so at the same diameter and length the unit weight is identical — the kg/m row and the length table of this chart apply to both. The terms threaded rod, all-thread, threaded bar and stud bolt all denote this fully threaded product family.
What are the pitch, root diameter and tensile stress area of M18 threaded rod?
Coarse pitch 2.5 mm, external thread minor (root) diameter about 14.93 mm, and tensile stress area As = 192 mm² (ISO 898-1). As drives tensile capacity and preload calculations — pair it with the torque chart.
Next: work out your order, or pick the size by standard
Related References
Bolt Weight Calculator
Interactive version: threaded rod / stud bolt at any length with nut & washer sets, material and coating factors — this size is pre-filled.
M18 Bolt Torque Chart
Same-size torque range and preload matrix by class × friction state, Nm↔ft-lb toggle — stud tightening reference.
M18 Hex Bolt Weight Chart
Per-piece and per-1,000-pcs weights for the same size, including matching nut and washer.
Double-End Stud Catalog
GB/T 901 and more: studs for pressure vessels and flange connections — custom sizes quoted to drawing.
Industrial Pipe Flange Fasteners
Stud bolts for PN flange connections: selection guide with matching studs and gaskets.
Tap Drill Chart for Threaded Rod
Threaded rod and stud bolt threads start as a drilled hole: tap drill, nearest drill bit and thread engagement, inch series included.
Non-Standard Size? Estimate It with a CNC Quote
The sizes on this page follow the standard series. If a drawing calls for an intermediate diameter, a modified head, or a specified material grade, our CNC quote calculator prices blank weight, machining time and finishing line by line.
Disclaimer: This chart is an engineering estimation for selection, quotation and freight estimation only. It does not constitute design or acceptance criteria.