Foundation Bolt Weight Calculator
Also works as an anchor bolt weight calculator — foundation bolts and anchor bolts share the same weight formula.
Results (L Type):
Weight of L Type Bolt: kg
Total Weight of Bolts: kg
Your inputs: Diameter=, Length 1= mm, Length 2= mm, No. of Nuts=, No .of Washers=, Total No. of Bolts=
Results (J Type):
Weight of J Type Bolt: kg
Total Weight of Bolts: kg
Your inputs: Diameter=, Length 1= mm, Length 2= mm, Radius= mm, No. of Nuts=, No. of Washers=, Total No. of Bolts=
Results (Straight Type):
Weight of Straight Type Bolt: kg
Total Weight of Bolts: kg
Your inputs: Diameter=, Length= mm, No. of Nuts=, No. of Washers=, Total No. of Bolts=
Results (Plate Welded):
Weight of Bolt + Plate: kg
Total Weight of Bolts: kg
Your inputs: Type=, Diameter=, Length= mm, Length 1= mm, Length 2= mm, No. of Nuts=, No. Washers=, Plate Sides= mm, Plate Thickness= mm, Total No. of Bolts=
Results (Sag Rod):
Weight of Sag Rod Bolt: kg
Total Weight of Bolts: kg
Your inputs: Diameter=, Length= mm, Thread Length= mm, No. of Nuts=, No. of Washers=, Total No. of Rods=
Results (Bracing Rod):
Weight of Bracing Rod Bolt: kg
Total Weight of Bolts: kg
Your inputs: Diameter=, Length= mm, Thread Length= mm, No. of Nuts=, No. of Washers=, Total No. of Rods=
Results (Stud Bolt):
Weight of Stud Bolt: kg
Total Weight of Bolts: kg
Your inputs: Diameter=, Length= mm, Thread Length 1= mm, Thread Length 2= mm, No. of Nuts=, No. of Washers=, Total No. of Bolts=
Foundation Bolt Weight Chart & Anchor Bolt Weight Chart (M12–M36)
Manufacturing since 1924 · ISO 9001:2015 · No minimum order · MTC with every batch
This bolt weight chart gives base weight per metre for solid mild steel round bar, before bends, threads, nuts or washers. For an exact nut bolt weight calculator in kg for any type — L, J, straight, plate-welded, sag rod, bracing rod or stud — use the calculator above, which accounts for bend allowance and fittings.
| Size | Diameter | Weight per Metre |
|---|---|---|
| M12 | 12mm | 0.888 kg/m |
| M16 | 16mm | 1.578 kg/m |
| M20 | 20mm | 2.466 kg/m |
| M24 | 24mm | 3.551 kg/m |
| M27 | 27mm | 4.494 kg/m |
| M30 | 30mm | 5.549 kg/m |
| M32 | 32mm | 6.313 kg/m |
| M36 | 36mm | 7.990 kg/m |
These figures are for foundation bolts and anchor bolts alike, since both start from the same round bar stock. J bolt weight follows the same base chart plus the hook allowance the calculator adds automatically — see our J-type foundation bolt page for sizes and grades, or our anchor bolt manufacturer page.
Frequently Asked Questions
Is this foundation bolt weight calculator free to use?
Yes, it is free with no sign-up required, for L-type, J-type, straight, plate-welded, sag rod, bracing rod and stud bolts from M12 to M36.
Does the calculator include the weight of nuts and washers?
Yes. Select the number of nuts in the form and the calculator adds their weight to the total, alongside the bolt itself.
How do I calculate bolt weight in kg manually?
For a straight mild steel bar, multiply the length in metres by the weight-per-metre figure for that diameter (see the reference table above). Bent types such as L-type and J-type need additional allowance for the bend, which the calculator above accounts for automatically.
Can I use this calculator for anchor bolt weight as well as foundation bolts?
Yes. Foundation bolts and anchor bolts share the same base weight calculation, since both are manufactured from the same round bar stock in the same diameters and grades.
Where can I find a J bolt weight chart?
The reference table above gives base weight per metre by diameter. Select J Type in the calculator to get the exact J bolt weight including the hook allowance, nuts and washers for your specific size.
Do you manufacture the bolts calculated here?
Yes. E S HAJI & CO manufactures every bolt type in this calculator, M12 to M100, since 1924, with no minimum order quantity and a Mill Test Certificate on every batch.
Need these bolts manufactured?
We manufacture every bolt type in this calculator from M12 to M100, to your specification, with Mill Test Certificates.
- L-Type foundation bolts manufacturer in Chennai
- J-Type foundation bolts manufacturer in Chennai
- T-Type foundation bolts manufacturer in Chennai
- Plate-type foundation bolts manufacturer
- Z sag rods for PEB purlin support
- Brace rods for structural bracing
- All foundation bolt types, grades and finishes
- Anchor bolts manufacturer in India
Also Sourcing Fabrication or Flanges for This Project?
Many of our bolt customers need structural fabrication, custom flanges or PEB accessories on the same project. We manufacture all of it in-house, in Chennai, with no minimum order.