How do I calculate how many studs I need?

Multiply wall length in feet by 0.75 for 16" OC spacing (or 0.5 for 24" OC), then add 1. Add 3 extra per corner and 2 per window or door opening.

What is the standard stud spacing?

16 inches on-center is standard for load-bearing walls and most residential construction. 24-inch OC spacing is used for non-load-bearing partitions and saves lumber.

What size lumber for wall studs?

2×4 studs (actual 1.5"×3.5") are standard for interior walls and exterior walls in most regions. 2×6 studs are used for exterior walls requiring extra insulation depth.

What is a king stud vs. jack stud?

King studs run full height from bottom to top plate on either side of a window or door. Jack studs (trimmer studs) are shorter and support the header above the opening.

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

A 10-foot wall at 16" OC spacing needs 9 studs (including both end studs). Add extra for corners, doors, and windows as needed.

Stud Spacing Calculator – DIY Calculators — Free Home Improvement Tools

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Quick Answer

To calculate wall studs needed, multiply wall length in feet by 0.75 for 16-inch on-center spacing (or 0.5 for 24-inch OC), then add 1. Add 3 studs per corner, 2 per window or door opening, and always round up to avoid a mid-project lumber run.

Calculate the number of studs needed for a wall and how much plate lumber to buy.

Wall Length (feet) Wall Height (feet) Stud Spacing Number of Corners/Intersections

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Cite This Tool

Stud Spacing Calculator. (2026). DIY Calculators Online. Retrieved from https://diycalculator.net/stud-calculator/

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