# Wall framing calculator

> 12′ wall, 8′ tall, 1 door: 15 studs (2×4 × 8′), 2 plates and 6 sheets of drywall, every stud placed on the drawing. Frame a non-load-bearing partition, hang drywall, tape and mud.

## What to buy (12′ wall, 8′ tall, 1 door)

Every line shows the quantity to buy and how StudSheet got it: the spacing, the waste and the package size, so you can check it before the supply house or the quote.

| Buy | Material | How StudSheet counts it | What it is for |
|---|---|---|---|
| **15 studs** | 2×4 (2×4 × 8′) | Layout: 10 studs at 16″ on center over 12′ − 2 replaced at the door opening + 2 king + 2 jack + 1 cut into a header and 2 cripples = 13. Plus 10% for warped boards. Cut each stud to fit (about 93″). | Framing lumber, actually 1½″ × 3½″. |
| **1 board** | 2×4 (2×4 × 12′) | One continuous plate for 12′. Cut it out inside the doorway after the wall is fastened. | Framing lumber, actually 1½″ × 3½″. |
| **1 board** | 2×4 (2×4 × 12′) | Single top plate — the IRC allows one on non-bearing interior walls. | Framing lumber, actually 1½″ × 3½″. |
| **≈98 screws (1 box of 100)** | 3″ framing screws (#9 or #10, exterior-rated) | 4 per stud (2 top, 2 bottom), 6 per jack stud, 8 per header, 4 per cripple, plus plate-to-joist and plate-to-floor fastening. With a framing nailer, use 16d nails instead. | Construction screws for framing by hand. (16d nails if you use a nailer.) |
| **6 sheets** | Drywall ½″ (4×8 sheets) | 153 sq ft to cover (2 sides, door openings removed) + 12% for cuts, ÷ 32 sq ft per sheet. | Standard gypsum board for walls. |
| **≈185 screws (1 lb box)** | Drywall screws, coarse thread (1¼″ coarse thread) | 7 studs behind each sheet × 4 screws per stud (USG: 16″ apart on walls with 16″ framing) × 6 sheets + 10%. A 1 lb box holds roughly 250. | Coarse thread bites wood studs. |
| **1 pail** | All-purpose joint compound (4.5-gal pail (≈62 lb)) | 1.5 gal needed: about 10 gal per 1,000 sq ft of board (USG), three coats. | Premixed “mud” for taping and finish coats. |
| **1 roll** | Paper joint tape (250 ft roll) | 57 ft: about 370 ft per 1,000 sq ft of board (USG). | Bedded in mud over seams and inside corners. |

### In Canada (3.66 m wall, 2.44 m tall, 1 door)

Set to Canada, the Sheet works the job out again for Ontario: metric sizes, bag sizes, the frost depth and the code notes. It doesn't just convert feet to meters. The first lines:

- **15 studs, 2×4:** Layout: 10 studs at 406 mm on center over 3.66 m − 2 replaced at the door opening + 2 king + 2 jack + 1 cut into a header and 2 cripples = 13. Plus 10% for warped boards. Cut each stud to fit (about 2.36 m).
- **1 board, 2×4:** One continuous plate for 3.66 m. Cut it out inside the doorway after the wall is fastened.
- **1 board, 2×4:** Single top plate: building codes usually allow one on a non-bearing interior wall — ask your building department.
- **≈98 screws (1 box of 100), 76 mm framing screws:** 4 per stud (2 top, 2 bottom), 6 per jack stud, 8 per header, 4 per cripple, plus plate-to-joist and plate-to-floor fastening. With a framing nailer, use 16d nails instead.
- **6 sheets, Drywall 13 mm:** 14.2 m² to cover (2 sides, door openings removed) + 12% for cuts, ÷ 3.0 m² per sheet.
- **≈185 screws (0.5 kg), Drywall screws, coarse thread:** 7 studs behind each sheet × 4 screws per stud (USG: 406 mm apart on walls with 406 mm framing) × 6 sheets + 10%. About 550 per kg.

## The steps, in order

> **DIY OK: you can do this yourself with standard tools.** About 14–20 hours of work for this example.

1. Find the ceiling joists with a stud finder and decide how the top plate gets fastened.
2. Snap the wall line on the floor. Transfer it to the ceiling with a plumb bob or laser at both ends.
3. Cut the plates, lay them side by side and mark the stud layout every 16″ plus the door rough opening (34″ × 82-1/2″).
4. Fasten the top plate to the joists and the bottom plate to the floor.
5. Measure each stud position floor-to-ceiling (they vary), cut, and screw or toe-nail it in.
6. Frame each door: king studs, jack studs, a header (flat 2×4), cripples. Then cut the bottom plate out of the doorway.
7. Check the wall for plumb every few studs before drywall.
8. Hang drywall horizontally, ½″ off the floor, joints staggered; screws 16″ apart into studs.
9. Tape and mud: bedding coat, fill coat, finish coat — overnight between each. Sand lightly, then prime.

## Tools (29)

Must-have tools first, then the ones that help and the ones to rent for the day.

| Tool | Need | Why |
|---|---|---|
| **Tape measure (25 ft)** | **Must have** | The red boxes every 16″ on the blade are stud spacing. |
| **Carpenter's pencil** | **Must have** | Flat, doesn't roll away, marks rough lumber. |
| **Chalk line** | **Must have** | Snaps a long straight line on floors, subfloors and ceilings. |
| **Speed square** | **Must have** | Triangle square for marking square and angled cuts on lumber. |
| **4-ft level** | **Must have** | Checks plumb and level over a long span. |
| **Stud finder** | **Must have** | Find the ceiling joists before anything else |
| **Plumb bob** | **Must have** | Transfers the floor line to the ceiling |
| **Circular saw** | **Must have** | Handheld power saw for lumber and sheet goods. |
| **Impact driver** | **Must have** | Drives 3″ framing screws |
| **Cordless drill/driver** | **Must have** | Drills holes, drives screws, mixes small batches. |
| **Framing hammer** | **Must have** | Nails, taps and persuades. |
| **Safety glasses** | **Must have** | Every cut, every nail, every time. |
| **Hearing protection** | **Must have** | Saws and nailers are loud enough to damage hearing. |
| **Step ladder (6 ft)** | **Must have** | Reaches 8-ft ceilings safely. |
| **Utility knife + blades** | **Must have** | Scores drywall and vinyl plank, trims pad. Swap blades often. |
| **Drywall T-square** | **Must have** | Guides straight, full-width drywall cuts. |
| **Drywall dimpler bit (or screw gun)** | **Must have** | Sets drywall screws just below the paper — no torn paper, no popped heads. |
| **Mud pan** | **Must have** | Holds joint compound while you work. |
| **6″ taping knife** | **Must have** | First coat: bed the tape, fill screw heads. |
| **10–12″ taping knife** | **Must have** | Wide knife for thin, feathered final coats. |
| **Sanding sponges** | **Must have** | Low-dust sanding for mud, patches and scuffing old paint. |
| **N95 dust masks** | **Must have** | Drywall sanding and general dust. |
| **Cross-line laser level** | Good to have | One-person plumb line from floor to ceiling |
| **Miter saw** | Good to have | Faster, squarer stud cuts |
| **Framing nailer + compressor** | Rent | Much faster than screws for a long wall |
| **Inside-corner trowel** | Good to have | Smooths both sides of an inside corner at once. |
| **Pole sander** | Good to have | Sands high and wide areas from the floor. |
| **Drywall rasp** | Good to have | Shaves a sheet edge for a clean fit. |
| **Work light** | Good to have | Raking light shows ridges in the mud |

## Mistakes and how the math works

### Mistakes that cost a callback or a second trip

- **Top plate with nothing to grab:** If the ceiling joists run along the wall, screws go into drywall only and the wall wobbles. Find the joists first; add blocking.
- **Cutting every stud to one length:** Floors and ceilings are never flat. Measure at each stud location and cut to fit — a stud ⅛″ long bows the ceiling.
- **Cutting the doorway plate too early:** Leave the bottom plate continuous until the wall is fastened, or the opening racks out of square.

### What the calculator assumes

- Non-load-bearing partition: single bottom plate + single top plate (IRC R602 allows a single top plate on non-bearing interior walls).
- Studs are cut to fit: height − 3″ of plates, bought as the next standard length (8′–16′) and cut several per board when short.
- Stud layout: one at each end plus one every 16″ on center.
- Each door: rough opening = door width + 2″ by 82½″ tall; 2 king + 2 jack studs. Header: a flat 2× when the top plate is within 24″ above it (IRC permits this in non-bearing walls for openings up to 8 ft); otherwise two 2×s on edge.
- Non-bearing 2×4 walls up to 14 ft tall (IRC Table R602.3(5)); fireblocking row when taller than 10 ft (IRC R302.11).
- +10% studs for warped or split boards.
- Drywall: net area (door openings removed) + 12% for cuts.
- Drywall screws: USG spacing — 16″ apart on walls with 16″ framing, 12″ with 24″ framing.
- Joint compound ≈ 10 gal per 1,000 sq ft and paper tape ≈ 370 ft per 1,000 sq ft (USG).
- Bottom plate on a concrete slab: pressure-treated (IRC decay protection).

## Code, permits and safety

The Sheet sets its code notes for the job's state or province. These are New Jersey's and Ontario's; the [code reference](https://studsheet.com/codes) has more. Always confirm with your building department.

- **Permits:** a job like this usually needs none, but towns set their own rules. Ask your building department if you're not sure.

## Questions

### What materials do I need to frame and drywall an interior wall?

For the worked example, a 12′ wall, 8′ tall, 1 door, the Sheet counts 8 lines with waste included, starting with 2×4 (15 studs), 2×4 (1 board), 2×4 (1 board), 3″ framing screws (≈98 screws (1 box of 100)). Each line's math is in the table above. Put in your own sizes in the [interior wall calculator](https://app.studsheet.com/p/wall) and every line is counted again.

### How long does it take to frame and drywall an interior wall, and can I do it myself?

About 14 to 20 hours for the worked example, in 9 steps. StudSheet stamps it **DIY OK**: you can do this.

### What tools do I need to frame and drywall an interior wall?

29 in all. The must-haves start with tape measure (25 ft), carpenter's pencil, chalk line, speed square, 4-ft level, stud finder. On the Sheet you mark each one as owned, to buy or to rent.

## Ask about it

Stuck while you frame and drywall an interior wall? Ask in the [Framing and walls group](https://studsheet.com/forum/framing) of the StudSheet community with this Sheet attached. Homeowners who've done it and verified pros answer, and anyone can read it.

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