# Baseboard and trim calculator

> 14′ × 12′ room: 49 ft of baseboard (2 × 16′ + 2 × 12′), in lengths that fit your walls, and 2 tubes of caulk. Baseboard, shoe, door casing and crown for a room: lengths that fit your walls, coped and mitered corners, nails, caulk and paint.

## What to buy (14′ × 12′ room)

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 |
|---|---|---|---|
| **2 pieces** | Baseboard 3¼″, primed (baseboard 3¼″ × 16′) | Baseboard on 4 walls, stopping at 1 door: 49 ft cut wall by wall from 2 × 16′ + 2 × 12′ (56 ft, at least +10% for recuts). | Primed finger-jointed pine or MDF baseboard, sold 8 ft, 12 ft and 16 ft long. |
| **2 pieces** | Baseboard 3¼″, primed (baseboard 3¼″ × 12′) | Baseboard on 4 walls, stopping at 1 door: 49 ft cut wall by wall from 2 × 16′ + 2 × 12′ (56 ft, at least +10% for recuts). | Primed finger-jointed pine or MDF baseboard, sold 8 ft, 12 ft and 16 ft long. |
| **1 box** | Finish nails (15 or 16-ga) (16-ga, 2½″) | 2 into every stud for baseboard: about 85 with 15% extra, in boxes of 1,000. | Face-nail the first and last rows where the flooring nailer can’t reach. Pre-drill hardwood. |
| **1** | Wood glue, small bottle | Copes, outside miters and scarf joints stay closed when they’re glued. | For copes, miters and scarf joints so they don’t open up. |
| **2 tubes** | Painter’s acrylic caulk (paintable) (10 oz, paintable) | The top of the baseboard: 49 ft + 15% at about 50 ft a tube (a ⅛–3/16″ bead). | Fills gaps between trim and wall. |
| **1 tub** | Wood putty, small tub (paintable) | Fill every set nail head before the finish. | Fills nail holes in trim and doors before paint (or a matching color for stained wood). |
| **1 quart** | Trim & door paint (semi-gloss, 2 coats) | About 16 sq ft of trim face × 2 coats ÷ 350 sq ft/gal = 0.09 gal. | Semi-gloss — wipeable. |

### In Canada (4.27 m × 3.66 m room)

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:

- **2 pieces, Baseboard 83 mm, primed:** Baseboard on 4 walls, stopping at 1 door: 14.94 m cut wall by wall from 2 × 4.88 m + 2 × 3.66 m (17.07 m, at least +10% for recuts).
- **2 pieces, Baseboard 83 mm, primed:** Baseboard on 4 walls, stopping at 1 door: 14.94 m cut wall by wall from 2 × 4.88 m + 2 × 3.66 m (17.07 m, at least +10% for recuts).
- **1 box, Finish nails (15 or 16-ga):** 2 into every stud for baseboard: about 85 with 15% extra, in boxes of 1,000.
- **1, Wood glue, small bottle:** Copes, outside miters and scarf joints stay closed when they’re glued.
- **2 tubes, Painter’s acrylic caulk (paintable):** The top of the baseboard: 14.94 m + 15% at about 15.24 m a tube (a 3–5 mm bead).
- **1 tub, Wood putty, small tub:** Fill every set nail head before the finish.

## The steps, in order

> **DIY OK: you can do this yourself with standard tools.** About 6–9 hours of work for this example.

1. Mark every stud on the wall just above where the trim’s top edge will be.
2. Baseboard: start on the wall opposite the door; square-cut into the first inside corner and cope the next piece, miter the outside corners, and scarf-join long walls over a stud with glue.
3. Fill: putty the nail holes; caulk the top edges and the casing to the wall, never the joint between shoe and floor, and let the caulk cure before painting.
4. Paint: two coats of semi-gloss trim paint, with tape on the floor.

## Tools (17)

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

| Tool | Need | Why |
|---|---|---|
| **Miter saw** | **Must have** | A 10″ compound miter saw for the miters and square cuts; rent or borrow one |
| **Coping saw** | **Must have** | Cope the inside corners so they stay tight |
| **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. |
| **Stud finder** | **Must have** | Mark every stud just above the trim line |
| **Finish nailer (15/16-ga)** | **Must have** | 16-ga for baseboard, casing and crown |
| **Air compressor + hose** | Rent | Runs the nailers (or use battery nailers) |
| **Caulk gun** | **Must have** | Caulk the top edges |
| **Putty knife** | **Must have** | Fill the nail holes |
| **Sanding sponges** | **Must have** | Sand the filler and the joints smooth |
| **4-ft level** | Good to have | Check the casing heads and long runs |
| **Digital angle finder** | Good to have | Measure out-of-square corners before cutting the miters |
| **Combination square (12″)** | Good to have | Mark the casing reveal |
| **Miter saw stand** | Good to have | Holds long pieces level at the saw |
| **2″ angled trim brush** | **Must have** | Two coats of semi-gloss |
| **Safety glasses** | **Must have** | Nailing and cutting |
| **Hearing protection** | **Must have** | Miter saw and nailers |

## Mistakes and how the math works

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

- **Mitering inside corners:** Miters on inside corners open up as the house moves. Square-cut one piece and cope the other.
- **Nailing shoe into the floor:** A floating floor has to move under it: nail shoe to the baseboard only.
- **No reveal on casing:** Casing flush with the jamb edge shows every wiggle. A ⅛–3/16″ reveal hides it.
- **Joints between studs:** A scarf joint that isn’t over a stud moves and cracks. Land every joint on a stud, glued.
- **MDF in a wet room:** MDF swells at the floor in bathrooms and basements. Use PVC there.
- **Caulking a stain-grade joint:** Caulk shows on stained wood. Cut tight joints and use matching filler instead.

### What the calculator assumes

- Four walls, length × width. Baseboard and shoe stop at each 3 ft door opening; crown runs all the way around.
- Pieces are cut wall by wall from 8′, 12′, 16′ lengths at the lowest cost; a wall longer than 16′ is spliced with a scarf joint over a stud.
- Then extra length until the stock covers the run + 10% (15% for crown and with 3 or more outside corners), for recuts and short returns.
- Casing (typical): a door side is two 83″ legs and a 41″ head; a window 3 ft wide and 4 ft tall is cased on 4 sides (two 53″ legs, two 41″ pieces).
- Nails: 2 per stud (16″ apart) for baseboard and crown, a pair every 12″ for casing. Caulk about 50 ft a tube. Paint: 2 coats at 350 sq ft per gallon on the trim’s face.

## 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 install baseboard and trim?

For the worked example, a 14′ × 12′ room, the Sheet counts 7 lines with waste included, starting with baseboard 3¼″, primed (2 pieces), baseboard 3¼″, primed (2 pieces), finish nails (15 or 16-ga) (1 box), wood glue, small bottle (1). Each line's math is in the table above. Put in your own sizes in the [trim calculator](https://app.studsheet.com/p/trim) and every line is counted again.

### How long does it take to install baseboard and trim, and can I do it myself?

About 6 to 9 hours for the worked example, in 4 steps. StudSheet stamps it **DIY OK**: you can do this.

### What tools do I need to install baseboard and trim?

17 in all. The must-haves start with miter saw, coping saw, tape measure (25 ft), carpenter's pencil, stud finder, finish nailer (15/16-ga). On the Sheet you mark each one as owned, to buy or to rent.

## Ask about it

Stuck while you install baseboard and trim? Ask in the [Trim and molding group](https://studsheet.com/forum/trim-and-molding) 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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