Calculating your cords of firewood is straightforward once you know the Firewood Cord formula and what each input means. This guide explains the method in plain language, walks through a manual calculation, and gives worked examples you can follow — then you can do it instantly with the Firewood Cord Calculator.
What is Firewood Cord?
The Firewood Cord calculation tells you your cords of firewood from a few simple inputs. The figure you are solving for here is the cords of firewood.
The Firewood Cord formula
The core formula is:
Cords of firewood = Stack length × Stack width (log length) × Stack height ÷ 128Here is what each input means:
- Stack length — a value measured in ft. Example: 8 ft.
- Stack width (log length) — a value measured in ft. Example: 4 ft.
- Stack height — a value measured in ft. Example: 4 ft.
How to calculate it step by step
- Write down the stack length (for example, 8 ft).
- Write down the stack width (log length) (for example, 4 ft).
- Write down the stack height (for example, 4 ft).
- Apply the formula above to get your cords of firewood.
- Double-check the result with the Firewood Cord Calculator.
Worked examples
Example 1
| Input / Output | Value |
|---|---|
| Stack length | 8 ft |
| Stack width (log length) | 4 ft |
| Stack height | 4 ft |
| Cords of firewood | 1.00 |
| Cubic feet | 128 |
With stack length of 8 ft, stack width (log length) of 4 ft and stack height of 4 ft, the cords of firewood works out to 1.00.
Example 2
With stack length of 16 ft, stack width (log length) of 4 ft and stack height of 4 ft, the cords of firewood works out to 2.00.
| Result | Value |
|---|---|
| Cords of firewood | 2.00 |
| Cubic feet | 256 |
Example 3
With stack length of 4 ft, stack width (log length) of 4 ft and stack height of 4 ft, the cords of firewood works out to 0.50.
| Result | Value |
|---|---|
| Cords of firewood | 0.50 |
| Cubic feet | 64 |
Tips for an accurate result
- Keep your units consistent — mixing, say, months with years or grams with kilograms is the most common source of error.
- Round only at the very end. Rounding inputs early can shift the final answer noticeably.
- Re-run the numbers whenever an input changes, rather than estimating from an old result.
Prefer not to do the maths by hand? — the Firewood Cord Calculator does it instantly, for free, with the formula and a worked example built in.
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