Cabinet Door Style Calculator
Calculate stile and rail dimensions, center panel size, and board feet needed for frame-and-panel cabinet doors.
About this calculator
Frame-and-panel construction builds a cabinet door from two vertical stiles, two horizontal rails, and a floating center panel captured in a groove — this calculator works out every cut dimension from your overall door size. The stiles simply run the full door height, but rail length is trickier: it equals the door width minus twice the stile width (the stiles overlap the rail ends) plus twice the tenon length, since each rail end extends into the stile with a tenon that's typically 3/8" to 1/2" long. The panel is sized to float inside the groove on all sides, so panel width and height are each the frame opening plus twice the groove depth (usually 1/4") of engagement — never cut a panel to fit flush against the groove bottom, since wood movement needs room to expand and contract seasonally. Board footage is calculated separately for frame stock (stiles and rails at 3/4" thickness) and panel stock, with different waste allowances applied: 15% for frame pieces (more milling and joinery waste) versus 10% for panels.
Selecting the glass-insert style zeroes out panel board footage entirely, since glass isn't lumber. A common mixup is confusing tenon length with groove depth — they serve different joints (rail-to-stile versus panel-to-frame) and use different default values, so check both before cutting. Scale everything by entering your total door count, since board footage totals multiply linearly with quantity.
Inputs
Results
Stile cut length (in)
24
Rail cut length (in)
11.25
How to Use This Calculator
- Enter the Door Width and Door Height in inches for the finished cabinet door.
- Enter Stile Width, Rail Width, Tenon Length, and Groove Depth for the frame construction.
- Select the Door Style: Shaker flat panel, raised panel, or glass insert.
- Enter the Number of Doors to scale all material totals for the full cabinet project.
- Review Stile and Rail Cut Lengths, Panel Dimensions, and Total Board Feet with waste to plan lumber purchases.
How the result changes with Door height (in)
| Door height (in) | Stile cut length (in) | Rail cut length (in) |
|---|---|---|
| 12 | 12 | 11.25 |
| 18 | 18 | 11.25 |
| 36 | 36 | 11.25 |
| 60 | 60 | 11.25 |
What each input means
- Door width (in)
- Overall finished door width in inches.
- Door height (in)
- Overall finished door height in inches.
- Stile width (in)
- Width of vertical frame members. Standard Shaker is 2-1/4".
- Rail width (in)
- Width of horizontal frame members. Often matches stile width.
- Tenon length (in)
- Length of the tenon on each rail end. Standard is 3/8" to 1/2".
- Panel groove depth (in)
- Depth of the groove that captures the floating panel.
- Number of doors
- Total doors to build. Material totals scale accordingly.
- Style (0=Shaker, 1=Raised, 2=Glass)
- Select the style (0=shaker, 1=raised, 2=glass)
What each result means
- Stile cut length (in)
- Cut length for each vertical stile piece.
- Rail cut length (in)
- Cut length for each horizontal rail (shoulder-to-shoulder + tenons).
- Panel width (in)
- Floating center panel width including groove engagement.
- Panel height (in)
- Floating center panel height including groove engagement.
- Frame board feet (per door)
- Board feet of 3/4" stock needed for stiles and rails of one door.
- Panel board feet (per door)
- Board feet needed for the center panel of one door.
- Total board feet (all doors)
- Total board feet for all doors without waste.
- Total BF with waste allowance
- Board feet including 15% frame waste and 10% panel waste.
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersDoor width (in) = 15, Door height (in) = 24, Stile width (in) = 2.25, Rail width (in) = 2.25 = 8 input(s) provided
- Calculate Stile cut length24 = 24
- Calculate Rail cut lengthRail cut length = doorWidth - 2 * stileWidth + 2 * tenonLength11.25 = 11.25
- Calculate Panel widthPanel width = doorWidth - 2 * stileWidth + 2 * grooveDepth11 = 11
- Calculate Panel heightPanel height = doorHeight - 2 * railWidth + 2 * grooveDepth20 = 20
Engine last updated . Checked against 2 independently-derived tests — how we verify calculators. Built by Paul Gunder, a software engineer, not a licensed financial, medical, or legal professional.
Frequently Asked Questions
Why is the rail cut length longer than the gap between the stiles?
The rail doesn't just span the opening between the two stiles — each end extends into a stile with a tenon, so the calculator adds twice the tenon length back on top of (doorWidth - 2 * stileWidth). If you cut rails to only the visible opening width, the joints will have no tenon to glue and the frame won't hold together.
Why does the panel come out slightly larger than the visible opening in the frame?
Panel width and height both add twice the groove depth to the frame opening, because the panel edges have to reach into the groove on every side to stay captured, not just sit flush at the opening's edge. That groove engagement (commonly 1/4") is also what leaves the panel room to float and move seasonally instead of binding against the frame.
How much lumber do I actually save by choosing a glass-insert door?
Choosing the glass-insert style (doorStyle = 2) sets panelThickness and panelBoardFeetPerDoor to zero, so totalBoardFeetPerDoor drops to just the frame lumber — stiles and rails — with no panel stock at all. For a typical door that's often close to half the board footage of a solid Shaker or raised-panel door of the same dimensions.
Why are frame and panel waste allowances different (15% vs 10%)?
The calculator applies a 1.15 multiplier to frame board feet but only 1.1 to panel board feet before summing them into totalWithWaste, reflecting that stiles and rails go through more milling steps — squaring, tenon cutting, groove routing — that each cost extra offcut, while a flat panel blank is cut closer to net size. These are fixed percentages in the formula, not adjustable inputs.
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