製材ボードフット計算機
Calculate board feet for standard dimensional lumber.
Lumber Calculator
Select a common lumber size or enter custom dimensions
Actual dimension (not nominal)
Remember: Nominal sizes (like 2×6) are larger than actual dimensions. A 2×6 actually measures 1.5" × 5.5" after drying and planing.
1× Boards
Actual 3/4" thick. Used for trim, shelving, and light projects.
2× Lumber
Actual 1.5" thick. Standard framing lumber for walls, floors, and decks.
4× Posts
Actual 3.5" thick. Used for posts, beams, and heavy structural work.
6× Timbers
Actual 5.5" thick. Heavy timbers for posts, beams, and landscaping.
よくある質問
What's the difference between nominal and actual size?
Should I use nominal or actual dimensions?
How many board feet in a typical 2×4×8?
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Calculate spray foam board feet and coverage area.
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Calculate wood weight from board feet and species density.
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Calculate studs, plates, and total board feet for wall framing.
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Calculate board feet for Philippine lumber standards.
ウッドデッキ材計算機
Calculate deck boards, linear feet, and costs
立方フィート計算機
Calculate cubic feet, cubic yards, and board feet
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