Stud Calculator
Count studs, plates, headers and cripples for a wall, with corners, T-intersections and every door and window accounted for.
The Stud Calculator runs entirely in your browser. Your wall dimensions stay on your device.
Open the Drywall Calculator
Stud Calculator について
A stud count is never just wall length divided by spacing. The wall needs a closing stud at the far end, three studs at every outside corner, two where a partition tees in, and each opening trades field studs for a king, jack and cripple assembly that adds more than it removes. Plates are simpler — one at the bottom and a doubled plate on top, three times the wall length — but they still have to be cut out of 16-foot stock, which is where the extra board comes from. This calculator does the whole takeoff, credits each opening the studs it displaces so an opening-heavy wall does not come out over-counted, and prints the layout marks you can pull straight off a tape.
機能
- Field studs with the closing stud included
- Three studs per corner and two per T-intersection
- King, jack and cripple studs per opening, with cripples below windows
- Field studs credited back where an opening displaces them
- Plate linear feet and boards at 16 foot stock
- Suggested header size for each opening width
- Layout marks in inches from the end of the wall
- Everything computes on your device
Stud Calculator の使い方
- Enter the wall length, height and stud spacing
- Add the corners and partition intersections in this run
- Add each door and window with its rough opening size
- Read the stud, plate, header and sheet counts
例
入力
20 ft wall · 8 ft high · 16 in OC · 2 corners · 1 tee · one 3 × 6.75 ft door · 10% waste
出力
29 studs before waste → 32 to buy · 60 linear ft of plate (4 boards) · 1 header (2× 2x6) · 5 sheets per side
The door removes two field studs but adds two kings, two jacks and three cripples.
よくあるエラーとトラブルシューティング
- The count seems high for a short wall. — Corners and intersections dominate short walls: three studs per corner and two per tee add up fast. On a 8 foot wall with two corners, the corner studs outnumber the field studs.
- Studs were left over after framing. — The calculator credits back field studs that fall inside an opening, but a real wall sometimes keeps one as a king. Small surpluses are normal and get used as cripples and blocking.
- The plate count looks short. — Plates are three times the wall length — one bottom plate and two top plates — and top plate joints must be offset from the studs and lapped at corners, so buy one extra 16 foot board per long wall.
よくある質問
- How many studs do I need for a 20 foot wall?
- At 16 inch centres a 20 foot wall takes 16 field studs, including the one that closes the end. Corners, intersections and openings are extra — two corners and one door typically push it to about 29.
- Is 16 or 24 inch stud spacing better?
- 16 inch centres are the residential default and required in many load-bearing situations. 24 inch advanced framing uses about a third fewer studs and leaves more room for insulation, but needs thicker sheathing or drywall and careful load paths.
- What are king, jack and cripple studs?
- A king stud runs full height beside an opening. A jack stud is cut short and sits inside the king to carry the header. Cripples are the short studs that fill the space above the header, and below the sill on a window.
- Why do corners need three studs?
- Two studs form the corner itself and the third gives the intersecting wall's drywall something to fasten to. A three-stud corner is the traditional detail; a two-stud corner with drywall clips saves lumber and leaves room for insulation.
- What size header does a 3 foot door need?
- A doubled 2x6 covers a 3 foot opening in a single-storey bearing wall, and a 6 foot opening wants a doubled 2x12. Loads from a storey above, roofs or point loads change that, so check local span tables.
関連ツール
- Deck Calculator — Boards, joists, footings and screws for a deck, with joist spans checked.
- 石膏ボード計算 — 部屋のボード枚数・パテ・テープ・ビスを見積もり。
- ボードフィート計算 — 木取りリストのボードフィートと費用を計算。
- R値計算 — 層を積み上げてU値と熱損失を計算します。
- 平方フィート計算機 — フィートまたはメートルで面積を計算、コストも見積もり。
- フェンス計算 — 支柱・胴縁・板材・コンクリート袋数を計算。
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