A WORKING DESK
Cable Length Calculator.
Estimate the total cable footage you need for any low-voltage install. Built by working installers, used on real jobs.
METHODOLOGY
How we calculate.
Total cable = (drops × average run) + (drops × service loop) + waste %. That last bit catches what most rookies miss — every cut, every re-pull, every "oh, I forgot to leave slack at the closet" adds up.
Don't trust your tape measure. Trust the path the cable will take, plus 15%.