basic

Christmas Tree Light Calculator

Number of fairy lights needed for a tree.

Estimate the number of fairy lights a Christmas tree needs based on tree height and the desired density (looks-good 100/ft, festive 150/ft, dazzling 200/ft).

Nadia Almasri By Nadia Almasri
Published Last reviewed 1 min read

Inputs

ft

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

Lights = tree height (ft) × density (lights per ft).

In depth

Estimate the number of fairy lights a Christmas tree needs based on tree height and the desired density (looks-good 100/ft, festive 150/ft, dazzling 200/ft).