Free tool

Christmas tree size calculator

Enter your ceiling height and your topper. You get the tree height to buy, how wide a full tree that tall will be, and how much floor to keep clear.

7 ft tree

Leaves 2 inches between the topper and the ceiling.

  • Tallest that fits7 ft 2 in, with the topper touching
  • Width of a full tree46 to 55 inches
  • Keep clear of heat3 ft from a fireplace, radiator, vent or candles

See the tree in your room

Numbers say it fits. A picture says whether it fills the corner or crowds it. Photograph the room, add a tree from any store, and see it in place.

Try it free How the visualizer works

The rules behind the numbers

  • Height: choose a tree at least 1 foot shorter than the ceiling, so an 8 foot ceiling takes a 7 foot tree [1]. The calculator also checks that the tree, the topper and the stand fit under the ceiling, and rounds down to the half foot trees are sold in.
  • The stand: a stand under a real tree typically adds 6 to 12 inches [2]. Put 0 if the tree's listed height already includes its stand. Measure your topper; if you don't use one, put 0.
  • Width: a full tree is typically 55 to 65 percent as wide as it is tall [2]. Slim and pencil trees suit small rooms and corners [1][2].
  • Safety: keep the tree at least 3 feet from any heat source, such as a fireplace, radiator, heat vent, candles or lights, and don't let it block an exit [3].

Shopping for a rug under it, or a coffee table to move out of the way? Try the rug size calculator and the coffee table size calculator.

Sources

  1. How to pick a Christmas tree, Bob Vila. Read November 1, 2026.
  2. What size Christmas tree by ceiling height, King of Christmas. Read November 1, 2026.
  3. NFPA offers tips to keep holidays festive and fire-safe, Connecticut Commission on Fire Prevention and Control. Read November 1, 2026.

Questions

What size Christmas tree for an 8 foot ceiling?

A 7 foot tree. It leaves a foot for the topper and some air above it. A 7.5 foot tree fits only with a small topper and a stand counted in the tree's height.

What size Christmas tree for a 9 foot ceiling?

An 8 foot tree, or 7.5 feet if your topper is tall or the stand adds height.

How much space should be between the tree and the ceiling?

Choose a tree at least 1 foot shorter than the ceiling, so the topper and stand fit with room to spare.

How wide is a 7.5 foot Christmas tree?

A full tree is usually 55 to 65 percent as wide as it is tall: about 50 to 59 inches for 7.5 feet. Slim and pencil trees are much narrower.

How far should a Christmas tree be from the fireplace?

At least 3 feet from any heat source, such as a fireplace, radiator, heat vent, candles or lights, and never blocking an exit.

Will it look right in my room?

The numbers say it fits. To see a tree from any store in your corner, take a photo of the room and add it: Renderior shows it in place, with a link to buy it.

See the tree in your living room before you buy it.

Try it free 2 free pictures every day. No card needed.