Calculate Cord Of Wood

Enter the dimensions of your stacked firewood to calculate the total volume in cubic feet and determine the number of cords.

Stack Dimensions (L x H x W in feet)	Total Volume (cubic feet)	Number of Cords
8 x 4 x 4	128	1.00 (Full Cord)
8 x 4 x 2	64	0.50 (Half Cord)
4 x 4 x 4	64	0.50 (Half Cord)
8 x 4 x 1.33 (approx 16")	42.67	0.33 (Face Cord, 16" pieces)
10 x 5 x 3	150	1.17

Common firewood stack dimensions and their corresponding cord volumes.

What is a Cord of Wood?

A "cord" of wood is a standard unit of measure for firewood volume. When tightly stacked, a full cord of wood occupies a volume of 128 cubic feet. This is most commonly visualized as a stack of wood that is 4 feet high, 4 feet wide (or deep), and 8 feet long (4 ft × 4 ft × 8 ft = 128 cu ft). When you want to calculate cord of wood, you are determining how many of these 128 cubic foot units your stack contains.

Anyone buying or selling firewood, or someone estimating their winter heating needs, should understand how to calculate cord of wood. It ensures fair transactions and proper planning. Common misconceptions include thinking a "face cord" (a stack 4 ft high x 8 ft long, but only as wide as the logs, e.g., 16 inches) is the same as a full cord, which it is not; a face cord is only a fraction of a full cord depending on log length.

Cord of Wood Formula and Mathematical Explanation

The formula to calculate cord of wood is based on the volume of the stacked wood:

1. Measure the length (L), height (H), and width (W) of your firewood stack in feet.
2. Calculate the total volume of the stack: Volume = L × H × W (in cubic feet).
3. Divide the total volume by 128 (the number of cubic feet in a full cord): Number of Cords = Volume / 128.

This method gives you the number of full cords your stack represents. To accurately calculate cord of wood, ensure your measurements are for the stacked wood, accounting for air space between logs, which is included in the 128 cu ft standard.

Variable	Meaning	Unit	Typical Range
L	Length of the wood stack	feet	2 - 100+
H	Height of the wood stack	feet	2 - 8
W	Width (or depth) of the wood stack	feet	1.33 (16") - 4
Volume	Total cubic volume of the stack	cubic feet	10 - 1000+
Cords	Number of full cords	cords	0.1 - 10+

Variables used to calculate cord of wood.

Practical Examples (Real-World Use Cases)

Example 1: Standard Stack

You have a neatly stacked pile of firewood that measures 8 feet long, 4 feet high, and the logs are cut to 4 feet lengths (making the stack 4 feet wide).

• L = 8 ft, H = 4 ft, W = 4 ft
• Volume = 8 × 4 × 4 = 128 cubic feet
• Cords = 128 / 128 = 1.0 cord

You have exactly one full cord of wood.

Example 2: Face Cord Stack

You buy wood advertised as a "face cord," and it's stacked 8 feet long, 4 feet high, but the logs are only 16 inches (1.33 feet) long.

• L = 8 ft, H = 4 ft, W = 1.33 ft
• Volume = 8 × 4 × 1.33 ≈ 42.6 cubic feet
• Cords = 42.6 / 128 ≈ 0.33 cords

This "face cord" is only about one-third of a full cord. It's crucial to calculate cord of wood based on all three dimensions to understand the actual volume you are getting, especially when dealing with different firewood types.

How to Use This Calculate Cord of Wood Calculator

1. Enter Stack Length: Measure the length of your wood pile in feet and enter it into the "Stack Length (L - feet)" field.
2. Enter Stack Height: Measure the average height of the pile in feet and enter it into the "Stack Height (H - feet)" field.
3. Enter Stack Width: Measure the width (depth) of the pile in feet, which is usually the length of the individual logs, and enter it into the "Stack Width/Depth (W - feet)" field.
4. Calculate: The calculator will automatically update, or you can click "Calculate" to see the "Total Volume" in cubic feet and the "Number of Cords".
5. Read Results: The "Number of Cords" tells you how many full cords you have. The "Total Volume" shows the space your stack occupies. The chart gives a visual comparison.

Use the results to verify firewood purchases or estimate your burning supply. If you are buying firewood, using a tool to calculate cord of wood ensures you receive the quantity you paid for. Check out our guide on how to stack wood for best measurement practices.

Key Factors That Affect Cord of Wood Measurement Results

• Stacking Tightness: A loosely stacked pile will contain less wood than a tightly stacked one within the same dimensions. The 128 cu ft standard assumes reasonably tight stacking with minimal large air gaps. When you calculate cord of wood, stacking method matters.
• Log Length Consistency: If log lengths vary greatly, the average width (W) might be harder to determine accurately, affecting the final volume.
• Stack Irregularity: If the height or length varies significantly along the pile, take average measurements for a more accurate calculate cord of wood.
• Settling: Wood can settle after stacking, reducing the height and the calculated volume over time.
• Wood Type: While not affecting the volume calculation, different wood types have different energy densities (see our BTU calculator), meaning a cord of oak provides more heat than a cord of pine.
• Moisture Content: Green wood is heavier and may occupy slightly different volume compared to seasoned wood, but the standard cord measurement is based on volume, not weight.

Frequently Asked Questions (FAQ) about Calculating a Cord of Wood

1. What is the difference between a full cord and a face cord?

A full cord is 128 cubic feet (e.g., 4'x4'x8'). A face cord is a stack 4' high by 8' long, but the width is only the length of the logs (e.g., 16" or 1.33'), so it's a fraction of a full cord. Always calculate cord of wood volume to be sure.

2. How many cubic feet are in a cord of wood?

There are 128 cubic feet in a standard full cord of wood.

3. Does the type of wood affect the volume of a cord?

No, a cord is a measure of volume (128 cubic feet), regardless of wood type. However, the density and heat output will vary by wood type.

4. How do I measure an irregularly stacked pile?

Try to get average measurements for length, height, and width. For height, measure at several points and average them. It's harder to accurately calculate cord of wood for very irregular piles.

5. Is air space included when I calculate cord of wood?

Yes, the 128 cubic feet measurement includes the air space between reasonably well-stacked logs.

6. Can I calculate cord of wood for round logs?

Yes, the method is the same, but round logs generally have more air space, so a cord of rounds might contain less solid wood than a cord of split wood.

7. How much does a cord of wood weigh?

It varies greatly depending on the wood species and moisture content, from 2000 to 5000 pounds or more.

8. What is a "rick" of wood?

The term "rick" is less standardized and often used interchangeably with "face cord," meaning a stack 4'x8' by the length of the logs. It's best to calculate cord of wood using dimensions to avoid confusion.