Extension reel and cable length
A guide, not advice. Check your kit maker's figures before you buy or pack.
The calculator needs JavaScript. The worked example, sum and figures below show exactly how it works, so you can do it yourself. A guide, not advice.
Short answer
Measure the cable route in sections, add the extra length you want for routing and compare the total with your cable. This estimates length only; check campsite rules and the cable and reel makers' electrical ratings and instructions.
Worked example
| You enter | Value |
|---|---|
| Measured route segments from hook-up point to pitch | 12 m, 4 m |
| Extra length you want for routing | 2 m |
| Cable length you have | 25 m |
Allow 18 m (59 ft 1 in) of cable
| Result | Value |
|---|---|
| Cable length to allow | 18 m (59 ft 1 in) |
| Cable comparison | Your cable is at least as long as this estimate. |
Show the working
- Route: 12 + 4 = 16.00 m
- Allowing extra: 16.00 + 2 = 18.00 m
- Cable available: 25 m
How it works
- Route length = sum of the measured route segments
- Cable to allow = route length + extra routing length
- Compare with the cable length you have
Follow campsite rules and the cable and reel makers' instructions. This tool estimates length only; it does not assess cable rating, connection safety or electrical load.
Our figures (adjustable)
These are our planning allowances and, once checked, typical figures with their sources. They aren't facts about your kit: change any of them in the calculator.
This calculator has no built-in defaults: every figure comes from you or your kit's own label.
What to buy
Shopping links will appear here once our retailer partners are confirmed. We don't rank kit by testing it: see our spec-based kit guides.
FAQs
Can I join two hook-up cables together?
Check the campsite's rules and the cable maker's instructions. This calculator does not assess electrical safety, ratings or connections.
Should I leave extra cable?
Measure the actual route and allow enough for the required path without creating a trip hazard. Follow site guidance for cable placement.
Guides that use it
Electric hook-up explained
What electric hook-up gives you on a UK campsite, how to add up the loads before you plug in, and what to do if the supply trips.