Tree height for a 2.1 m ceiling, by stand and topper
The stand, the topper and the gap you leave under the ceiling all come off the ceiling height. Here is the tallest tree and the largest standard size for a 2.1 m ceiling with different combinations:
| Stand and topper | Tallest tree | Size to buy |
|---|---|---|
| 5 cm stand, no topper | 2.03 m | 1.8 m (6 ft) |
| 8 cm stand, 15 cm topper | 1.85 m | 1.8 m (6 ft) |
| 8 cm stand, 20 cm topper (this page) | 1.80 m | 1.8 m (6 ft) |
| 12 cm stand, 30 cm topper | 1.66 m | 1.5 m (5 ft) |
| 8 cm stand, 20 cm topper, 15 cm clear of a light fitting | 1.67 m | 1.5 m (5 ft) |
Trees that fit, with width and lights
The largest size is not always the best choice. A full tree is about 60% as wide as it is tall, and the floor space adds 30 cm each side. The last column is the space left above a 20 cm topper.
| Tree | Width at the base | Floor to clear | Lights (300 a metre) | Spare height |
|---|---|---|---|---|
| 1.2 m (4 ft) | 72 cm | 1.32 m | 360 | 60 cm |
| 1.5 m (5 ft) | 90 cm | 1.50 m | 450 | 30 cm |
| 1.8 m (6 ft) | 108 cm | 1.68 m | 540 | 0 cm |
A 2.1 m ceiling: a tight fit for a 1.8 m tree
A ceiling this low turns up in some cottages, loft rooms and park homes. With an 8 cm stand, a 20 cm topper and a 2 cm gap, a 1.8 m (6 ft) tree fills the space exactly. Leaving the topper off does not get you a bigger tree: the next size, 2.1 m, needs 10 cm more than the ceiling gives even with no topper at all.
With no height to play with, save floor space instead. A full 1.8 m tree is about 108 cm across at the base; a slim or pencil tree of the same height takes far less of a small room, and a flat star or a bow on the tip keeps it clear of the ceiling.
Use the Christmas tree size calculator with your own stand and topper, and see what Christmas lights cost to run before the lights go on every evening. Keep a real tree well away from fires, heaters and radiators (1 metre is the distance commonly quoted), and top up its water every day.
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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Frequently asked questions
What size Christmas tree for a 2.1 m ceiling?
A 1.8 m (6 ft) tree, with an 8 cm stand, a 20 cm topper and a 2 cm gap under the ceiling. That leaves room for 1.80 m of tree, and 1.8 m is the largest standard size that fits.
How wide is a 1.8 m Christmas tree?
About 108 cm across the bottom branches for a full tree, which is about 60% of its height. Clear about 1.68 m of floor so there is room for the skirt and to walk past. Slim trees are narrower.
How many lights for a 1.8 m tree?
About 540 at 300 lights a metre, a rule of thumb for a full look. Retailer guides vary widely, so use fewer for cluster lights and more for a dense look.
Can I fit a 2.1 m tree under a 2.1 m ceiling?
Not with a 20 cm topper and an 8 cm stand: a 2.1 m tree needs 30 cm more than a 2.1 m ceiling leaves. Even without a topper it does not fit, so stay with the 1.8 m tree.
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.