Cable length & boxes

CCTV Cable-Length Calculator

Estimate how much cable to buy for a CCTV job and catch runs that are too long before you pull them. Enter the cable type, the number of cameras, the average and the longest run, and a spare allowance to get the total metres, how many 305 m boxes that is, and a max-run warning. Planning figures; runs in your browser.

Cable type

Cat6 — max run 100 m

Number of camerasSpare / service loop (%)slack at both ends — ~10% typical

Average run (m)camera to recorder / switchLongest single run (m)the one to check against the max

0 m

Total cable

305 m boxes

8 cameras × 25 m average × +10% spare, rounded up to whole 305 m (305 m / 1000 ft) boxes.

Longest run check

Longest run (40 m) is within the Cat6 max (100 m). Good to pull.

Planning estimate only — measure the real routes, not straight lines (cable follows walls, trays and ceilings, so it is always longer), add slack at both ends, and keep power and data cables separated. Confirm quantities and run lengths on site before you order.

Plan the cabling properly

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Related Tools — You may also find these useful

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