**Use our board foot calculator to quickly and accurately estimate the amount of usable lumber in a log or piece of timber, and number of boards you need. **

For 1-inch thick boards: 1 board foot = 1 square footFor 3/4-inch thick boards: 1 board foot = 1.33 square feetFor 1/2-inch thick boards: 1 board foot = 2 square feet

## Board Foot Calculator

- Board feet in a 2x4x10 =
**Board Feet = (1.5 * 3.5 * 10) / 12 = 4.375 board feet** - Board feet in 2x2x12 =
**Board Feet = (1.5 * 1.5 * 12) / 12 = 2.25 board feet** - Board Feet in a 2x6x12 =
**Board Feet = (1.5 * 5.5 * 12) / 12 = 8.25 board feet** - Board Feet in a 2x6x10 =
**Board Feet = (1.5 * 5.5 * 10) / 12 = 6.875 board feet**

Thickness (in) | Width (in) | Length (ft) | Board Feet |
---|---|---|---|

1 | 6 | 8 | 4 |

1 | 8 | 10 | 5.33 |

1 | 12 | 6 | 6 |

1.5 | 3.5 | 12 | 5.25 |

1.5 | 4 | 10 | 5 |

1.5 | 6 | 8 | 6 |

2 | 4 | 10 | 6.67 |

2 | 6 | 12 | 12 |

2 | 8 | 16 | 21.33 |

2 | 10 | 10 | 12.5 |

2 | 12 | 14 | 28 |

2.5 | 4 | 10 | 8.33 |

2.5 | 6 | 12 | 15 |

3 | 4 | 8 | 8 |

3 | 6 | 10 | 15 |

3 | 8 | 12 | 24 |

3 | 10 | 14 | 35 |

4 | 4 | 10 | 13.33 |

4 | 6 | 12 | 24 |

4 | 8 | 16 | 42.67 |

## Board Foot Formula

The formula for calculating board feet is **straightforward**:

**Board Feet = (Thickness in inches * Width in inches * Length in feet) / 12**

- One
**board foot**equals**1 inch thick**by**12 inches wide**by**1 foot long**(1″ x 12″ x 1′). - The formula assumes the board is at least
**1 inch thick**. - For logs, a modified version is often used:
**(D x D x L) / 16**

Where**D**is the diameter in inches and**L**is the length in feet.

Different scaling rules (**Doyle**, **Scribner**, **International 1/4 Inch**) may use variations of this formula to account for factors like log taper and saw kerf.

## How to Calculate Board Feet

To calculate **board feet**, follow these steps:

**Measure Dimensions:**

**Thickness**in inches**Width**in inches**Length**in feet

**Apply the Formula:** **Board Feet** = (**Thickness** x **Width** x **Length**) / 12

For Logs, Use: **Board Feet** = (**Diameter** x **Diameter** x **Length**) / 16

**Example for Lumber:**

**2″ thick**,**6″ wide**,**8′ long board**- (2 x 6 x 8) / 12 =
**8 board feet**

**Example for a Log:**

**16″ diameter**,**12′ long log**- (16 x 16 x 12) / 16 =
**192 board feet**

For a board measuring 1 inch thick, 8 inches wide, and 10 feet long:

**Board Feet = (1 * 8 * 10) / 12 = 6.67 board feet**

## How to Convert board feet to square feet?

- A board foot is a volume measurement (1 ft x 1 ft x 1 inch)
- A square foot is an area measurement (1 ft x 1 ft)

**Square Feet = Board Feet / (Thickness in inches / 12)**

Convert 100 board feet of 1-inch thick lumber to square feet.

**Square Feet = 100 / (1 / 12) = 1200 square feet**

## How many square feet are in 200 board feet?

**200 board feet** = **200 × (1/12) cubic feet = 16.67 cubic feet**

If we spread out **16.67 cubic feet** of lumber at **0.75 inches (0.0625 feet)** thick, we can calculate the square footage:

**Square feet** = Volume in cubic feet ÷ Thickness in feet**Square feet** = **16.67 ÷ 0.0625 = 266.67 square feet**

A **200 board feet** is equivalent to approximately **266.67 square feet** of **1-inch (nominal) lumber**.

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