Enter your tree height and see how many lights, strings and ornaments to buy, how much garland, what skirt fits and what the lights add to your power bill.
The calculator turns your tree height into a shopping list. The lights rule comes from retailers and decorating guides: about 100 lights per foot of height on a standard-shape tree, 500 to 600 on a 7 ft tree for a subtle look and up to 1,000 for a full one (Govee, Christmas Central). A 6 ft tree gets 600 lights, or six strings of 100. Ornaments run 10 to 15 per foot on trees under 9 ft and 12 to 20 from 9 ft up (Christmas Central), with 6.2 per foot as a starting point for a restrained look (Old World Christmas); at 6 ft that is 75, in a range of 60 to 90, split into small, medium and large. Garland runs 5 to 9 units per unit of height, the skirt is the width of the lowest branches plus 4 to 6 inches and the topper needs 12 inches (30 cm) to the ceiling. Slim and full trees change the math through their width: at 7.5 ft, 43 against 60 inches. The Energy tab uses the Electric Choice wattage per string, where 100 mini bulbs draw 40 W incandescent or 7 W in LED, and the rate is always the one you type. The Roofline tab adds a 10% allowance to the eave measurement and divides by the string length. How many strings you can connect end to end depends on the model and is left to the label.
Paste the code into your HTML and the tool shows up on your page, without J-Kit's navigation and ads. It still runs in the browser of whoever visits your site.
<iframe
src="https://jkit.tools/embed/en-US/christmas-tree-calculator"
width="100%"
height="600"
style="border:0"
loading="lazy"
title="Christmas Tree Lights and Ornaments Calculator"
></iframe>
<p style="font-size:12px;margin:6px 0 0">Tool by <a href="https://jkit.tools/en/tools/christmas-tree-calculator">J-Kit</a></p>Using it in a paper, class or post? Copy the link or a ready-made reference. The access date is today's.
<a href="https://jkit.tools/en/tools/christmas-tree-calculator">Christmas Tree Lights and Ornaments Calculator</a>
These references help contextualize formulas, standards, APIs and limitations used on this page. They do not replace professional validation when a result has legal, financial, medical or operational impact.
About 600 lights for a standard 6 ft tree, which is six strings of 100. The rule is 100 lights per foot of height. A subtle look takes 429 to 514 lights and a packed one 600 to 857. Slim trees take fewer and full trees take more, because the count follows the width.
6 ft 0 in tree, about 41 in wide at the base.
600
6 strings of 100 lights, about 198 ft of wire
Rule: 100 lights per ft of height, times 1.00 for the tree shape (Govee, Christmas Central).
75
Range: 60 to 90
Rule: 12.5 ornaments per ft of height (Christmas Central, Old World Christmas, Christmas in America). Size split from the Christmas in America 7.5 ft chart.
42 ft
Range: 30 ft to 54 ft
Rule: 5 to 9 units of garland per unit of height; the look picks the point in the range (Christmas Central, Old World Christmas).
46 in
Range: 45 in to 47 in
Skirts sold for this height: 48 to 60 in.
Rule: width of the lowest branches plus 4 to 6 inches, 5 by default (Size-Charts.com, House Digest). Widths at 7.5 ft: slim 43 in, full 60 in.
Leave at least 11 3/4 in between the tree tip and the ceiling for a standard topper. Add the ceiling height under More options to check.
Rule: 12 in (30 cm) between the tip and the ceiling (Size-Charts.com).