# Stud Calculator

- **URL:** https://codeasystem.com/calculators/construction/stud-calculator/
- **Category:** construction
- **Description:** Count studs for a wall framed at 16 or 24 inches on center, with plate lumber and corner/opening guidance included.
- **Primary output:** Studs at 16" on center: 16 studs

## Inputs
- Wall length (name: `wallLength`, type: number, example: 20)
- Stud spacing (name: `spacing`, type: select)
- Wall height (name: `wallHeight`, type: number, example: 8)

## Outputs
- Studs at 16" on center: 16 studs
- Plate lumber (bottom + double top plate): 60 linear ft
- Recommended stud length: 8 ft
- Extra for corners & openings: + add one stud per corner intersection, doorway or window rough opening

## Formula / methodology
```
Studs = ⌈ Wall length(ft) × 12 ÷ spacing(in) ⌉ + 1
```

Divide the wall’s length in inches by the on-center spacing to place studs, then add one for the closing end stud. The result covers king studs at wall ends; corners, doorways and window openings each demand additional jack, king and cripple studs noted separately below the result.

## Assumptions & limitations
- Single straight wall with studs at uniform on-center spacing.
- Plates sized as one bottom plate plus a doubled top plate (three runs of lumber).
- Load-bearing headers, corners and openings require extras beyond the computed count.

## How to use
1. **Enter wall length**; Measure the total run of the wall in feet, including any door or window openings within it.
2. **Choose spacing**; 16″ OC suits most load-bearing and tiled walls; 24″ OC works for simple non-structural partitions and saves lumber.
3. **Add framing extras**; Use the note row: one backup stud per corner, jack and king stud pairs per opening, above the base count.

## Example
Framing a 20-foot wall at 16″ on center places a stud every 16 inches: 240 ÷ 16 = 15, plus the end stud, for 16 studs; plus one extra at each corner and opening.

Result for these inputs:

```
Studs at 16" on center: 16 studs
```

## About this calculator
### Why 16 inches won

Sixteen inches on center divides neatly into 48- and 96-inch sheet goods, letting sheathing land exactly on stud centers. Twenty-four-inch spacing halves stud count and passes code in many non-load applications; but check local rules before switching.

### Openings eat studs quietly

A single window adds a header, two jack studs, two king studs and sill cripples; easily five members beyond open-wall spacing. Estimating walls by raw spacing alone is why framers buy 10–15% extra lumber.

### Plates triple your linear footage

Every wall runs three plates: one on the floor and a double on top. The plate-lumber row captures that hidden demand, which on long walls rivals the studs themselves in board feet.

## FAQs
### How far apart are studs normally?

16 inches on center is the US default; 24 inches appears in energy-efficient advanced framing and some partitions.

### Does the +1 stud really matter?

Yes; spacing alone places studs between the ends but leaves the final corner empty without the closing end stud.

### Can I use this for a load-bearing wall?

For counting yes, but load-bearing walls also need engineered headers and possibly doubled studs; consult your plans or an engineer.

### What height studs should I buy?

Pre-cut 92⅝" studs plus three 1½" plates produce exact 8-ft finished ceilings; the recommended-length row reflects your entered wall height.

## Related calculators
- [Drywall Calculator](https://codeasystem.com/calculators/construction/drywall-calculator/)
- [Square Footage Calculator](https://codeasystem.com/calculators/construction/square-footage-calculator/)
- [Length Converter](https://codeasystem.com/calculators/conversion/length-converter/)

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Last updated: 2026-08-23 · Version: 1.0.0 · [HTML version](https://codeasystem.com/calculators/construction/stud-calculator/)