Concrete Barrier (Jersey Barrier) Segment Count Calculator

SettingsSettings for this calculationUS

Market

Imperial · sales tax

Total Barrier Run Length

The total length of the barrier run to be protected.

Measure the full length along the barrier's alignment, not a straight-line distance if the run curves.

Standard segment length

The length of one standard precast barrier segment.

3.05 m (10 ft) is a common precast Jersey barrier segment length, but confirm the actual length of the product being supplied.

Barrier segments needed

33 segments

High confidence

Then change the inputs to see how far the answer moves.

Show calculation logic

How this was calculated

Formula source(s)

Segment count = ceil(total run length ÷ standard segment length), the standard method for estimating precast Jersey barrier segments (commonly 3.05m/10ft each) along a run

Inputs used

Total Barrier Run Length: 330 ft
Standard segment length: 10 ft

Final result33 segments

What this calculation does not cover

Free-standing precast barrier is designed to MOVE when it is struck, and how far depends on how many segments are pinned together either side of the impact. A short run shoves aside as individual blocks, which is why highway standards set a minimum installed length upstream and downstream of the thing being shielded, and why the clear working width BEHIND the barrier matters as much as the count in front of it. Four segments dropped around an opening is arithmetically correct and functionally nothing.
The run length entered should be the length of need, not the length of the hazard. How far barrier has to start ahead of an obstruction is set by approach speed, the offset from the travelled way and the flare rate, and that computed length routinely runs well past the obstruction at both ends. A take-off measured across the hole leaves the run short exactly where a vehicle would arrive at it.
A segment count is not a delivery or a placement plan. A 3.05 m (10 ft) barrier weighs around two tonnes (2.2 tons), so thirty of them is sixty of those arriving on trailers carrying eight to ten units apiece, and every one has to be set in its final position by a machine with the reach and capacity to do it. On a live carriageway that placement rate, not the segment count, is what sizes the lane closure.

Estimated cost — your price

Price per segment ($)

This site holds no price list for this material — local prices vary too much to publish honestly. Enter your supplier's price and the result is costed with it.

Computed in your browser — nothing you enter is uploaded. Presented in US customary units and US trade terminology. Where a formula follows a published standard, that standard and its edition are cited beside it on this page; where none governs, the page says so. Local amendments override model codes — verify against the code in force where you build.

Sources checked 2026-09-06 · in the site-wide review of 2026-09-06 · v1.0.1

Regulatory standards & verification citations1

Segment count = ceil(total run length ÷ standard segment length), the standard method for estimating precast Jersey barrier segments (commonly 3.05m/10ft each) along a run

Cite this page

Your workspace

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Now that you have the number

These guides cover the work this quantity is for — the first ones run this calculator inside the section that raises the question.

Setting Bollards and Concrete Barriersuses this calculator

Precast barrier is counted by the segment, a bollard is poured by the hole: how to price and book both before the trucks are ordered.

Fencing a Site Perimeter

How to calculate concrete barrier (Jersey barrier) segment count in 3 steps

Total Barrier Run LengthThe total length of the barrier run to be protected.

Standard segment lengthThe length of one standard precast barrier segment.

Barrier segments neededThe tool computes the barrier segments needed from those figures and shows the formula, its sources, and a confidence rating alongside it.

Total Barrier Run Length	Barrier segments needed (segments)
200 ft	20
300 ft	30
400 ft	40
500 ft	50
600 ft	60

Total Barrier Run Length

Barrier segments needed (segments)

200 ft

300 ft

400 ft

500 ft

600 ft

Frequently asked questions

Why is the segment count rounded up?

Precast barrier segments are supplied as whole units, so any partial-segment remainder at the end of the run still requires a full additional segment (or a shorter custom-cut segment) — rounding up ensures the run is fully covered.

What segment length should I use?

3.05 m (10 ft) is a common standard precast Jersey barrier segment length, but manufacturers also supply other standard lengths (e.g. 6.1 m / 20 ft). Use the actual segment length of the product being supplied for an accurate count.

Does this account for end sections, transitions, or anchorage?

No — this calculates the base number of standard run segments only. End treatments, transition sections, connection pins/keys, and anchorage to pavement should be planned separately per the barrier manufacturer's layout details.