Stud Calculator

Calculate the exact number of wood or metal studs needed for your wall framing project. Account for standard spacing, corners, and window or door openings instantly.

Wall length feet Please enter a positive number

On-center (OC) spacing

16" OC is standard for residential drywall

Extra studs (Doors/Windows) studs Add ~2 studs per opening or corner Please enter 0 or a positive number

Waste buffer %

Please enter a valid percentage

Calculation Results

Studs to order

— studs

Includes the end stud and requested waste buffer.

How to use this stud calculator

Enter your wall length

Measure the total linear length of the wall you are framing in feet.

Select your OC spacing

Choose your "On-Center" spacing. 16 inches is the gold standard for load-bearing walls and perfectly accommodates 4x8 drywall sheets. 24 inches is sometimes used for non-load-bearing interior partitions.

Add extra studs for openings

Every door, window, or wall intersection requires extra structural studs (king studs and jack studs). A safe rule of thumb is adding 2 to 3 extra studs per opening.

Review the material list

The calculator provides the total vertical studs needed and automatically calculates the linear feet required for your top and bottom plates.

Framing Stud Estimates (Includes 10% Waste Factor)

Wall Length	Stud Spacing (On-Center)	Plates (LF)	Total Studs Needed
10 ft	16 inches	30 LF	10 Studs
10 ft	24 inches	30 LF	7 Studs
16 ft	16 inches	48 LF	15 Studs
16 ft	24 inches	48 LF	10 Studs
20 ft	16 inches	60 LF	18 Studs
20 ft	24 inches	60 LF	13 Studs
24 ft	16 inches	72 LF	21 Studs
24 ft	24 inches	72 LF	15 Studs
30 ft	16 inches	90 LF	26 Studs
30 ft	24 inches	90 LF	18 Studs
40 ft	16 inches	120 LF	35 Studs
40 ft	24 inches	120 LF	24 Studs
50 ft	16 inches	150 LF	43 Studs
50 ft	24 inches	150 LF	29 Studs
80 ft	16 inches	240 LF	68 Studs
80 ft	24 inches	240 LF	46 Studs
100 ft	16 inches	300 LF	84 Studs
100 ft	24 inches	300 LF	57 Studs
150 ft	16 inches	450 LF	125 Studs
150 ft	24 inches	450 LF	84 Studs
200 ft	16 inches	600 LF	167 Studs
200 ft	24 inches	600 LF	112 Studs

Frequently asked questions

How many studs do I need for a 10 foot wall?

For a standard 10-foot wall with 16-inch on-center spacing, you will need 9 studs. (120 inches ÷ 16 = 7.5, which rounds up to 8, plus 1 extra stud for the very end of the wall). If you have doors or windows, you will need to add 2-3 extra studs per opening.

Should I use 16-inch or 24-inch stud spacing?

16-inch on-center (OC) is the standard for most residential and commercial construction because it provides strong structural support and naturally aligns with the edges of standard 4x8-foot drywall sheets. 24-inch OC spacing uses fewer materials and is sometimes acceptable for non-load-bearing interior walls or specific advanced framing techniques.

How do I account for doors and windows in my framing?

Openings break the standard framing pattern and require structural reinforcement. You typically need a "king stud" and a "jack stud" on both sides of a door or window. The easiest way to estimate is to add 2 to 3 extra studs to your total count for every opening or wall intersection.

How many top and bottom plates do I need?

Standard wall framing requires three plates running horizontally along the wall: one bottom plate (treated lumber if touching concrete) and two top plates. Therefore, you need 3 times your wall length in linear feet of plate material. Our calculator automatically outputs this total linear footage for you.

About this calculator

This stud calculator helps carpenters, general contractors, and DIY remodelers generate an accurate lumber takeoff for wall framing. Whether you are using 2x4 wood studs or metal tracking, buying the correct number of structural pieces prevents costly project delays.

The core mathematical formula used by this tool is:

Wall Length (inches) = Wall Length (ft) × 12
Base Studs = (Wall Length (inches) ÷ OC Spacing) + 1 End Stud

Total Studs = Base Studs + Extra Studs + Waste Factor
Plate Linear Feet = Wall Length (ft) × 3 (1 Bottom, 2 Top Plates)

Why the "+ 1 End Stud"? If you have a wall that is 16 inches long, dividing 16 by 16 gives you 1. However, you need a stud at the 0-inch mark to start the wall, and another at the 16-inch mark to finish it. You always need one more stud than the number of spaces between them.