Calculate door weight in lb or kg from height, width and thickness using typical wood densities, or estimate hollow-core and solid-core doors per square foot.

Prefilled with a standard 80 × 36 × 1¾ in door. Enter your own size.

Typical dry densities for a solid slab; real doors vary with species, moisture and core.

Optional settings
Blank means no cutouts; removed material uses the same density or area rating.

Blank means zero. Exclude hardware already included in the area rating.

Door Weight Formula

The following formula is used to calculate the weight of a door.

DW = L / 12 × W / 12 × T / 12 × D
  • Where DW is the door weight (lbs)
  • L is the length of the door (inches)
  • W is the width of the door (inches)
  • T is the thickness of the door (inches)
  • D is the density of the door material (lbs/ft^3)
    • 48 lbs/ft^3 as an illustrative MDF assumption
    • 70 lbs/ft^3 as an illustrative HDF assumption; use the product specification

To calculate the weight of a door, simply calculate the volume with the length, width, and thickness, then multiply by the density of the material.

How much does a garage door or rolling shutter weigh?

If the manufacturer gives a weight per square foot or square meter for the door panels or shutter curtain, select Weight from mass per area, then Custom weight per area. Enter the panel or curtain width and height and the listed rate. The estimate is area × weight per area. Include moving hardware in Optional settings only if the listed rate excludes it.

If the manufacturer lists the finished door weight for your model, size and options, use that figure directly. Two doors of the same size can differ in weight because of their panels, insulation, windows and reinforcement. A curtain-only estimate excludes the fixed guides and housing. Confirm the finished weight with the manufacturer or installer for spring, opener or track selection.

What is a door weight?

Door weight here means estimated mass in lb or kg. Use net volume times density for a uniform slab, or net area times a manufacturer mass-per-area rating for other constructions, then add hardware not already included.

What is the average weight of a door?

Door weight depends on dimensions and construction. The 100-pound value below is one solid-slab example, not a universal average.

How to calculate the weight of a door?

Example Problem:

The following example outlines how to calculate the weight of a door.

First, determine the length. In this example, the door is measured to be 80″ tall.

Next, determine the width. This is measured to be 30″ wide.

Next, determine the thickness. The thickness is 1.5 inches.

Next, determine the density. For this example, a medium-density fiberboard will be used which has a density of 48 lbs/ft^3.

Finally, calculate the door weight using the formula above:

DW = L/12*W/12*T/12 * D

DW = 80/12*30/12*1.5/12 * 48

DW = 100 lbs