How much polywire do I need for rotational grazing?

Paddock count is (rest days ÷ grazing days) + 1. Most graziers own two reels and move them, so the line you need out at once is two cross-fences, not all of them. On five square acres that's roughly 1,030 ft — one 1,640 ft roll.

Is one strand enough?

For cattle and horses that already know the fence, yes — that's the whole reason interior lines can be casual. Goats, sheep and mixed groups want two.

Does it need tensioners?

It helps. One customer had deer hit the line and slacken it, then bought poly tension tools and sorted it out. On a fence you reel up every few days, hand tension is usually enough.

Will it still shock at the far paddock?

That's what the copper is for. Stainless-only budget polywire runs at several ohms per metre and throws away a large share of the pulse over a long lead. This runs 0.3 Ω/m.

Polywire 1/8" 9-Strand — Rotational Grazing Wire

Polywire

The mover.

Nine strands, three of them tinned copper, on a wooden reel that pays out clean when you're doing it alone. The cheapest way to buy distance that still bites at the far end.

from

$29.99

about 2–3¢ per foot

Buy on Amazon ▸How much do I need?

Amazon price on 2026-08-26 — check the listing for today’s.

Macro detail of the white, neon-yellow and blue polywire weave

Right for you if…

Not this one if

It's the perimeter. A thin cord is the hardest of the three to see, and the fence that has to be trustworthy without you watching it should be tape or rope.

You move fence — strip grazing, rotation, a paddock that changes shape every week.
You need distance cheaply: the 3,280 ft roll works out around two cents a foot.
You want a movable line that still carries a real correction, which stainless-only wire doesn't.

The numbers

What's actually on the reel

Grazeline published engineering specs. Every one of these is a number we print because year three depends on it.
Format	1/8" 9-strand polywire
Conductor	3 tinned copper + 6 stainless steel (304)
Resistance	0.3 Ω/m
Break strength	330 lb
Colors	White / neon yellow / blue
Weathering	UV, rust and corrosion resistant
Ships on	A wooden reel — one-person payout
Roll sizes	1,000 ft · 1,640 ft · 3,280 ft
Warranty	10 years

Sizes

Pick your roll

1,000 ft

1/8" 9-strand · 0.3 Ω/m · 330 lb

ASIN B0DHD7RY6D

$29.99

Buy on Amazon ▸

1,640 ft

1/8" 9-strand · 0.3 Ω/m · 330 lb

ASIN B0DHD6MHML

$39.99

Buy on Amazon ▸

3,280 ft

1/8" 9-strand · 0.3 Ω/m · 330 lb

ASIN B0DHD88PKT

$69.99

Buy on Amazon ▸

Amazon price on 2026-08-26 — check the listing for today’s.

Ships from Amazon. 10-year warranty either way.

From verified Amazon reviews

What owners say after a season

“It carries a good zap, and has held up well to repeated moving and UV.”
802woodchuck — Polywire, after a year

“Horses, cows, and dogs seem to see it no problem. Nice and flexible. Seems to shock well.”
AP — Polywire 3,280 ft

“It appeared to be longer than stated. When transferring it to a Gallagher reel with a stated capacity of 1,200 metres, I was unable to fit the entire roll.”
Doug Lindsey — Polywire

“10 year warranty!”
Doug Lindsey — review title

Polywire questions

How much polywire do I need for rotational grazing?: Paddock count is (rest days ÷ grazing days) + 1. Most graziers own two reels and move them, so the line you need out at once is two cross-fences, not all of them. On five square acres that's roughly 1,030 ft — one 1,640 ft roll.
Is one strand enough?: For cattle and horses that already know the fence, yes — that's the whole reason interior lines can be casual. Goats, sheep and mixed groups want two.
Does it need tensioners?: It helps. One customer had deer hit the line and slacken it, then bought poly tension tools and sorted it out. On a fence you reel up every few days, hand tension is usually enough.
Will it still shock at the far paddock?: That's what the copper is for. Stainless-only budget polywire runs at several ohms per metre and throws away a large share of the pulse over a long lead. This runs 0.3 Ω/m.

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