Math Formula For Calculating The Length of String Lights

December 6th, 2024

Yesterday, I wrote this math equation for precisely (I think) calculating the length of a string of lights wrapped around a christmas tree – assuming the tree is shaped like a perfect cone and that the lights are as tighly and evenly wrapped around the cone as possible.

Excuse the Swedish! The variables are described as followed:

  • H: the tree's height
  • r: the tree's radius
  • v: the amount of revolutions

This is hardly a feat in the math world, and my equations are probably quite bloated, but I'm still quite happy with it, alright? :)
You can play around with it here on Desmos if you'd like!