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Cable Quantity & Box Calculator

Work out how many metres and 305 m boxes of network cable a job needs, and check the longest run.

Cable Quantity & Box Calculator

Work out how many metres and 305 m boxes of network cable a job needs, and check the longest run.

Number of cable runs

Average run length (m)

Along the cable path from the rack to the outlet, not in a straight line.

Longest run (m)

Slack per run (m)

Service loops and termination at both ends.

Waste allowance (%)

Box or reel size

Results

Cable needed: 1,003 m

Boxes to order: 4

Left over: 217 m

Longest run with slack: 73 m

Runs over 90 m will not pass certification for Ethernet; plan a closer switch or fibre for them.

Building a bigger job?Add these figures to a project, then add results from any of the other calculators. The project becomes one report you can save as a PDF and import again later to make changes.

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How it works

Each run is its length plus slack. The runs are added up and a waste allowance goes on top, and the boxes are that total divided by the box length, rounded up. The longest run with slack is checked against the 90 m permanent link that TIA-568 allows (100 m including patch leads).

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