cord of wood calculator

Accurately calculate the volume of your firewood stack in cords and cubic feet.

Common Firewood Stack Sizes

Stack Type	Dimensions (L x H x W)	Cubic Feet	Total Cords
Full Cord	8′ x 4′ x 4′	128	1.00
Face Cord (Rick)	8′ x 4′ x 1.33′	42.6	0.33
Half Cord	4′ x 4′ x 4′	64	0.50
Quarter Cord	4′ x 4′ x 2′	32	0.25

What is a Cord of Wood Calculator?

A Cord of Wood Calculator is a specialized tool designed to help homeowners, wood sellers, and heating enthusiasts determine the exact volume of a firewood stack. In North America, the standard unit of measurement for firewood is the "cord." However, because wood is often stacked in irregular shapes or sold in "face cords," it can be difficult to know exactly how much fuel you are receiving or storing.

Anyone who relies on wood-burning stoves, fireplaces, or outdoor boilers should use a Cord of Wood Calculator to ensure they have enough fuel for the winter season. A common misconception is that any large pile of wood constitutes a cord. In reality, a cord is a very specific legal measurement of volume, and using a Cord of Wood Calculator removes the guesswork from your purchase.

Cord of Wood Calculator Formula and Mathematical Explanation

The mathematics behind the Cord of Wood Calculator is based on three-dimensional volume calculation. The standard definition of a cord is a well-stacked pile of wood that occupies 128 cubic feet (3.62 cubic meters).

The step-by-step derivation is as follows:

1. Measure the length, height, and width of the stack in feet.
2. Multiply these three dimensions to find the total cubic feet.
3. Divide the total cubic feet by 128 to find the number of cords.

Variable	Meaning	Unit	Typical Range
L	Stack Length	Feet (ft)	2 – 24 ft
H	Stack Height	Feet (ft)	2 – 6 ft
W	Stack Width (Log Length)	Feet (ft)	1 – 4 ft
V	Total Volume	Cubic Feet (ft³)	0 – 500 ft³

Practical Examples (Real-World Use Cases)

Example 1: The Standard Delivery

A homeowner receives a delivery that is stacked 12 feet long, 4 feet high, and the logs are 16 inches (1.33 feet) deep. Using the Cord of Wood Calculator logic: 12 * 4 * 1.33 = 63.84 cubic feet. Dividing by 128 gives 0.498 cords. This is effectively a half-cord of wood.

Example 2: Large Storage Shed

A farmer stacks wood in a shed that is 8 feet wide, 8 feet high, and 8 feet deep. The Cord of Wood Calculator would compute: 8 * 8 * 8 = 512 cubic feet. 512 / 128 = 4.00 cords. This stack represents four full cords of firewood.

How to Use This Cord of Wood Calculator

Using our Cord of Wood Calculator is straightforward and designed for high precision:

• Step 1: Measure your stack's length from end to end.
• Step 2: Measure the average height of the stack. If the top is uneven, take measurements at several points and use the average.
• Step 3: Measure the width, which is typically the length of the individual logs.
• Step 4: Select the wood type to get an estimated weight, which is helpful for transport considerations.
• Step 5: Review the results instantly. The Cord of Wood Calculator updates as you type.

Key Factors That Affect Cord of Wood Calculator Results

While the Cord of Wood Calculator provides a precise mathematical volume, several real-world factors can influence the actual amount of "solid wood" you have:

1. Stacking Tightness: A loosely stacked pile will have more air gaps, meaning less actual wood per cord.
2. Log Diameter: Smaller branches often stack more tightly than large, round logs.
3. Split vs. Round: Split wood generally packs more densely than round logs of the same size.
4. Bark Thickness: Species with thick bark (like Oak) may show a higher volume on the Cord of Wood Calculator but contain slightly less wood fiber.
5. Moisture Content: While volume doesn't change much, the weight calculated by the Cord of Wood Calculator will vary significantly between green and seasoned wood. Check our firewood moisture content guide for more details.
6. Species Density: Different trees have different BTU values. Knowing the best wood for burning helps you understand the energy value of your cord.

Frequently Asked Questions (FAQ)

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

A full cord is 128 cubic feet. A face cord (or rick) usually refers to a stack 8′ long and 4′ high, but only one log deep (typically 16 inches). A face cord is roughly 1/3 of a full cord.

2. How much does a cord of wood weigh?

A cord of seasoned hardwood weighs between 2,500 and 4,500 pounds depending on the species. Green wood can weigh significantly more due to water content.

3. Can the Cord of Wood Calculator handle metric measurements?

This version uses feet, but it provides the result in cubic meters as an intermediate value for international users.

4. Why does my stack look smaller than a cord?

If your logs are short (e.g., 12 inches), a stack that is 8'x4′ is only 1/4 of a cord. Use the Cord of Wood Calculator to verify the depth.

5. Does the way I stack wood affect the calculation?

The Cord of Wood Calculator measures the outer dimensions. Professional stacking (bark up, tight fit) ensures you get the most wood in that volume. Learn how to stack firewood properly.

6. How many face cords are in a full cord?

Typically, there are 3 face cords in a full cord, assuming the logs are cut to 16 inches in length.

7. Is a "truckload" a cord?

Rarely. A standard pickup truck bed (6.5ft) can only hold about 1/3 to 1/2 of a cord when stacked neatly. Always use a Cord of Wood Calculator to verify delivery amounts.

8. How long does it take to season a cord of wood?

Most hardwoods take 6-12 months to season. You can find more seasoning firewood tips in our dedicated guide.