Coffered Ceiling Calculator

Grid dimensions and material from ceiling size.

Inputs

Ceiling length (ft)

Ceiling width (ft)

Grid bays (length)

Grid bays (width)

Beam depth (in)

Beam width (in)

Beam cost per LF ($)

Panel cost/sq ft ($)

Tab to move between fields

Results

Number of coffers

12

Beam linear feet124

Beam intersections20

Panel area (sq ft)152.89

Coffer length (in)43

Coffer width (in)42.7

Material cost$1,078.67

Total Beam Material (sq ft)165.33

How to Use This Calculator

Enter Ceiling length (ft), Ceiling width (ft), and Grid bays (length).
Set Grid bays (width), Beam depth (in), and Beam width (in).
Adjust Beam cost per LF ($), Panel cost/sq ft ($) as needed.
Review the Number of coffers result.
Use Beam linear feet and Beam intersections to inform your decision.

What each input means

Ceiling length (ft): Length of the ceiling area.
Ceiling width (ft): Width of the ceiling area.
Grid bays (length): Number of coffer bays along the length.
Grid bays (width): Number of coffer bays along the width.
Beam depth (in): How far beams drop below ceiling (depth of the coffer).
Beam width (in): Face width of each beam.
Beam cost per LF ($): Cost per linear foot of beam material.
Panel cost/sq ft ($): Cost per square foot for recessed panel material.

What each result means

Number of coffers: Total recessed panels in the grid.
Beam linear feet: Total linear feet of beam material (both directions).
Beam intersections: Number of cross-points requiring notch or lap joints.
Panel area (sq ft): Total area of recessed coffer panels.
Coffer length (in): Internal length of each coffer panel.
Coffer width (in): Internal width of each coffer panel.
Material cost: Estimated cost for beams and panels.

How this is calculated

Worked example, using the default values

Identify Input Parameters
4 parameters
Ceiling length (ft) = 16, Ceiling width (ft) = 12, Grid bays (length) = 4, Grid bays (width) = 3 = 8 input(s) provided
Calculate Number of coffers
Number of coffers
12 = 12
Calculate Beam linear feet
Beam linear feet = lengthwiseLf + widthwiseLf
124 = 124
Calculate Beam intersections
Beam intersections
20 = 20

Engine last updated July 28, 2026. Checked against 2 independently-derived tests — how we verify calculators.

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