Christmas Tree Calculator: How Many Lights and Ornaments

How many lights do you need for a Christmas tree? This free Christmas tree calculator tells you how many lights, light strings and ornaments to buy for your tree. Pick the height of your tree and how full you want it to look, and get the numbers in seconds. It works on phone and computer and needs no sign-up.

Christmas 2026

How Many Lights and Ornaments Do I Need?

Pick your tree height. Get the number of lights, light strings and ornaments for your Christmas tree.

1. Your tree

Tree height3 ft (90 cm)4 ft (120 cm)4.5 ft (135 cm)5 ft (150 cm)6 ft (180 cm)6.5 ft (195 cm)7 ft (210 cm)7.5 ft (225 cm)8 ft (240 cm)9 ft (275 cm)10 ft (300 cm)12 ft (365 cm) How full do you want it?Cozy and simpleClassic glowDazzling and full Lights on each string you own or plan to buy50 lights100 lights150 lights200 lights300 lights

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By Wilhelmina Digital Studio. Nothing you type is saved.

How it works: choose your tree height and a look. A cozy tree uses about 75 lights per foot, a classic glow about 100 per foot and a dazzling full tree about 125 per foot. Ornaments are a rough guide of about 9, 12 or 16 per foot of height, with around 40% plain filler baubles. Then choose how many lights are on each string to see how many strings to buy.

Also useful: the Christmas cookie calculator, the Christmas dinner calculator and the Christmas card list tracker.