Cubic Feet to Board Feet Converter
Enter the lumber volume in cubic feet below to convert it to board feet.
Convert Cubic Feet (ft³) to Board Feet
Enter a value in cubic feet (ft³) (ft³) to convert to board feet (FBM).
Cubic Foot to Board Foot Conversion Table
Table showing various cubic foot measurements converted to board feet. Click any preset value or arrow to load it into the converter.
How to Convert Cubic Feet to Board Feet
To convert cubic feet to board feet, multiply the lumber volume by the following conversion ratio: 12 board feet/cubic foot.
Since one cubic foot is equal to 12 board feet, you can use this simple formula to convert:
The lumber volume in board feet is equal to the lumber volume in cubic feet multiplied by 12.
For example, here's how to convert 10 cubic feet to board feet using the formula above.
How Many Board Feet Are in a Cubic Foot?
There are 12 board feet in a cubic foot, which is why we use this value in the formula above.
Our cubic foot to board foot calculator automatically converts your lumber volume measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Cubic Feet and board feet are both units used to measure lumber volume. Keep reading to learn more about each unit.
What Is a Cubic Foot?
A cubic foot is a unit of lumber volume equal to 12 board feet (FBM), the base unit for lumber volume. 1 cubic foot equals 12 board feet. [1]
The cubic foot is classified as a US customary unit of lumber volume. Cubic Feet can be abbreviated as ft³; for example, 1 cubic foot can be written as 1 ft³.
When working with cubic feet (ft³) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, cubic feet (ft³) are widely used across standard lumber volume applications within US customary workflows, engineering documentation, and technical data sheets.
What Is a Board Foot?
North American lumber volume unit equal to 1 ft × 1 ft × 1 in (144 in³ = 1/12 ft³). It serves as a primary reference unit for measuring lumber volume across scientific and practical applications. [2]
The board foot is classified as a US customary unit of lumber volume. Board Feet can be abbreviated as FBM; for example, 1 board foot can be written as 1 FBM.
As the primary coherent reference unit for lumber volume in this category, all other lumber volume units are mathematically anchored to the board foot (FBM).
In practice, board feet (FBM) are widely used across standard lumber volume applications within US customary workflows, engineering documentation, and technical data sheets.
When converting lumber volume between cubic feet (ft³) and board feet (FBM), keep full floating-point precision (1 ft³ = 12 FBM; 1 FBM = 0.0833333 ft³) during intermediate calculations and round only the final board foot figure to match your instrument tolerance.
More Cubic Foot & Board Foot Conversions
Need to calculate in the opposite direction? Use our board feet to cubic feet (ft³) converter (FBM to ft³) to switch your starting unit immediately. You can also explore related tools such as converting thousand board feet (mbf) to board feet, converting cubic meters (m³) to board feet, or converting board feet to thousand board feet (mbf).
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Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Length)·Volume - Lumber Metrology Standard — Cubic Feet (ft³) (ft³) to Board Feet (FBM)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: Cubic Foot (Timber) (ft³) & Board Foot (FBM)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (ft³ to FBM)