How Many Lights for a 7ft Christmas Tree?

A 7ft (2.1 m) Christmas tree needs about 630 lights at 300 per metre of tree, a rule of thumb for a full look. That is 4 sets of 200, or about 32 m of lit wire with bulbs 5 cm apart. For a lighter look use 315; for a dense one, 945.

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Example job shown. Change the numbers to match yours.

Tallest tree that fits

2.10 m

210 cm of tree, after the stand, topper and gap

Largest standard sizeTrees are sold in sizes of 1.2, 1.5, 1.8, 2.1, 2.4 and 3 m (4, 5, 6, 7, 8 and 10 ft): 2.1 m
Width of that tree (at the base)A full tree is about 60% as wide as it is tall; slim trees are narrower: 126 cm
Floor space to clearTree width plus 30 cm each side, for the skirt and for walking past: 1.86 m across
Lights to buy (about 300 per metre)A rule of thumb for a full look: UK retailer guides range from about 80 to nearly 500 lights per metre. Use 450 per metre for a dense look, or fewer for cluster lights: 630 lights

Measure the ceiling where the tree will stand, and watch for sloped ceilings, beams and light fittings. A real tree loses a little height as it dries, and its branches spread more as it warms up. Keep a tree well away from heaters, fires and radiators: fire services say to keep it clear of heat sources, and 1 metre (about 3 feet) is the distance commonly recommended.

Before you buy: round up to whole packs, check the size printed on the label, and add a little spare. Your supplier has the final say.

Lights for a 7ft tree, by how full you want it

Retailer guides disagree a lot, from about 80 to nearly 500 lights per metre of tree. Here are three points in that range, with the sets you would need and the length of lit wire at 5 cm between bulbs:

Lights per metre	Look	Lights	Sets of 200	Sets of 500	Lit length
150 a metre	Light, or cluster lights	315	2	1	16 m
300 a metre	Full (the calculator)	630	4	2	32 m
450 a metre	Dense	945	5	2	47 m

A 7ft tree: watch the label

A tree sold as 7ft is 213 cm tall, a little more than 2.1 m. At 300 lights a metre the extra 3 cm adds only 10 lights, so about 630 gives a full look either way.

This is the size that fits a 2.4 m ceiling. Plan for 2 sets of 500 or 4 sets of 200, and put the first set on near the trunk so that the tree is lit from the middle out.

Running LED tree lights for the whole season costs very little: see what Christmas lights cost to run. For the room, see the tree for a 2.4 m ceiling. Keep a real tree well away from fires, heaters and radiators, and switch the lights off when you go out or go to bed.

Want to change anything else? The calculator above is the full Christmas Tree Size Calculator (UK): What Height Tree for My Room?: edit any number and the results update instantly.

Tools & materials for this project

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Christmas tree stand Tree skirt String lights (warm white)Tree topper Tree disposal bag

Frequently asked questions

How many lights for a 7ft Christmas tree?

About 630 at 300 lights per metre of tree, a rule of thumb for a full look. Use about 315 for a lighter look or cluster lights and 945 for a dense one.

How many sets of lights for a 2.1 m tree?

4 sets of 200 or 2 sets of 500 for 630 lights. Connectable sets let you run them from one plug.

How long should lights be for a 7ft tree?

About 32 m of lit wire with bulbs 5 cm apart, plus the lead to the socket. Wider spacing means a longer set for the same number of bulbs.

What ceiling height do I need for a 7ft tree?

At least 2.4 m, with an 8 cm stand, a 20 cm topper and a 2 cm gap. A full tree this size is about 126 cm wide at the base.

Related sizes and guides

Related sizes

Estimates only. Results assume standard materials and simple shapes. Supplier products vary, and the final call on quantity, structure and safety is yours. Check your local code and your supplier's guidance before ordering.

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