What is the actual measurement of a 2x4?

A 2x4 board is not actually 2inx4in. what are their actual measurements?

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  • 1 decade ago
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    Have to click on this old question. Yeah, 1-1/2" x 3-1/2". Or so. Can vary a bit. And yeah, they start as 2 x 4, and milled to nominal size. And pressure treated is usually a bit bigger than clear. I notice that in homes on slabs, where they use a pressure treated sill plate, the bottom of the drywall typically bows out a bit.

    And for 2" it is 1-1/2"

    for 4" it is 3-1/2"

    for 6" it is 5-1/5"

    but after that minus 3/4"

    for 8" it is 7-1/4"

    10" it is 9-1/4"

    12" it is 11-1/4"

    Those are the average size, sometimes they are a bit bigger.

    Just had to see what the answers were. Sometimes you get weird theories.

    Source(s): contractor and home design.
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  • shep
    Lv 4
    4 years ago

    2x4 Measurements

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  • 4 years ago

    2x4 Actual Dimensions

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  • 5 years ago

    This Site Might Help You.

    RE:

    What is the actual measurement of a 2x4?

    A 2x4 board is not actually 2inx4in. what are their actual measurements?

    Source(s): actual measurement 2x4: https://shortly.im/VlFob
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  • 1 decade ago

    MOST of the time 1.5X3.5. However, that is considered "nominal" and it could vary by as much as an eighth of an inch. This is for new wood. Old wood actually used to be much closer to 2X4 than now.

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  • 1 decade ago

    1.5" x 3.5" you can no longer purchase a true 2x4 .All lumber has been shaved back to save. Due to the high demand for lumber, the forestry services are being forced to cut premature trees and unable to keep up with the demand. Now we buy lower quality lumber ,but must pay a premium price

  • 1 decade ago

    3.5" x 1.5" in general. All depends on where you buy them actually. In general if you get them from a local lumber yard that buys them from a local lumber mill they are larger than ones bought form Lowes or Home Deopt. And pressure treated is almost always larger than common lumber but shrinks down to about the same size.

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  • Anonymous
    1 decade ago

    2"X4"s (or 2"x6"s or anything else) have not changed dimension to accomodate plywood sheeting or drywall. Sheesh.

    2"X4" refers to the rough cut (pre-planed) dimension the boards are sawed to at the mill. That's why hardwoods that finish to 3/4" are referred to as 4/4" stock, 1" 3/4" as 8/4" and so on. Softwoods do not usually plane out with as little waste as hardwoods, hence the additional dimensional allowance.

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  • 1 decade ago

    The simple answer is 1.5" x 3.5".

    The extended answer, as to why they're called 2x4's, is (like was mentioned earlier), in the times before plywood sheeting, the dimensions were truly 2" x 4".

    Now 2x4's have changed dimension to accomodate the additional 1/2" of plywood. It's the same with all lumber....2x6's are 5 1/2", 2x8's are 7 1/2, etc.

  • 1 decade ago

    1 1/2" x 3 1/2".

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