BARBED / RAZOR WIRE ROLL CALCULATOR
Figure out how many rolls of barbed wire or BTO-22 razor concertina to order for a perimeter project. We factor in how many strands you run along the top of the fence and report total metres, roll count and tonnage for both classic twisted barbed wire and razor wire coils.
Inputs
Logic Used
required = fence_length × strand_count rolls = ⌈required / roll_length⌉
Roll count is rounded up; any remainder stays as leftover on the last roll. Total weight = rolls × roll_weight. We recommend adding ~5% waste for splices and tie-offs on site.
Result
No calculation yet
Choose a product type, enter fence length and strand count; the result will appear here.
Classic Barbed Wire Reference
EN 10223-1 compliant galvanised twisted barbed wire. Standard roll length is 100 m; 250 m rolls can be produced by special order.
| Wire / Barb spacing | Roll | Weight |
|---|---|---|
| Ø1.70 × 2 / 100 mm | 100 m | 8.0 kg |
| Ø2.00 × 2 / 100 mm | 100 m | 11.5 kg |
| Ø2.50 × 2 / 100 mm | 100 m | 17.0 kg |
| Ø2.50 × 2 / 150 mm | 100 m | 15.0 kg |
| Ø2.80 × 2 / 100 mm | 100 m | 22.0 kg |
Razor Wire (BTO-22) Reference
BTO-22 razor concertina: galvanised steel tape punched with 22 mm blades, mounted on a centre core wire and wound into a spiral coil. Larger coil diameters give longer expanded coverage and heavier weight.
| Type | Coil Diameter | Loops | Expanded | Weight |
|---|---|---|---|---|
| BTO-22 | ⌀450 mm | 33 | 6 m | 5.5 kg |
| BTO-22 | ⌀600 mm | 55 | 10 m | 9.0 kg |
| BTO-22 | ⌀730 mm | 56 | 12 m | 11.0 kg |
| BTO-22 | ⌀960 mm | 56 | 15 m | 13.5 kg |
Where It Is Used
Classic barbed wire is strung along the top of panel or chain-link fences in 3–5 strands carried by Y- or V-type extension arms. Razor wire is used on military installations, correctional facilities, border security and high-security perimeters, laid as concertina coils on the ground or along a wall top.
Installation Note
For classic barbed wire install top-mounted extension arms on each post and plan a tensioner every 3–5 posts to keep the line taut. For razor wire, place coils with roughly 1 m overlap between neighbours and fasten each overlap with at least 3 stainless-steel clips.
