Cord of Wood Calculator

A full cord of firewood is 128 cubic feet (4 × 4 × 8 ft).

How the Math Works

The Cord of Wood Calculator uses the formula cords = length × height × depth ÷ 128 to determine how many cords are in a firewood stack. A cord is a standardized unit of volume equal to 128 cubic feet, representing a pile that is 4 feet high, 4 feet wide, and 8 feet long. By multiplying the three dimensions of your stack (in feet) and dividing by 128, the calculator converts the total cubic footage into the number of cords, giving you an accurate measure of your firewood quantity.

Practical Applications

To use this calculator practically, measure your firewood stack in feet, recording the length (longest dimension), height (from floor to top), and depth (width when stacked). Enter these three measurements into the calculator and it will instantly compute the cord equivalent. This is especially useful when purchasing firewood, as sellers often quote prices per cord, or when planning storage space to ensure your stack fits within available area.

Day-to-Day Use

Knowing exactly how many cords you have helps with budgeting, as firewood costs are typically quoted per cord. It prevents overpaying for wood you don't need or running short during winter months. Additionally, understanding your cord measurements helps you plan proper stack dimensions to maximize storage efficiency while maintaining the necessary spacing for air circulation, which keeps firewood dry and ready to burn.

Worked example

8 × 4 × 4 ft → exactly 1 cord.

FAQ