Firewood Cord Calculator
Convert a stack of firewood into cords, face cords and cost.
Enter your values
Enter the stack length in ft.
Enter the stack height in ft.
Enter the log length in in.
Enter the price paid in $.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Full cords
- 0.333
- Stacked volume
- 42.67 cubic feet
- Face cords (at this log length)
- 1
- Price per full cord
- $750.00
- Approx heat value (seasoned hardwood)
- 7 million BTU
Working
- 18 x 4 x 1.33 = 42.67 ft3 / 128 = 0.333 cords
Quick answer
A full cord is 128 cubic feet of stacked wood (4 x 4 x 8 ft). Divide your stack volume by 128 to get cords.
cords = length x height x log length / 128
At a glance
| What it does | Convert a stack of firewood into cords, face cords and cost. |
|---|---|
| Category | Home & DIY |
| Inputs needed | Stack length, Stack height, Log length, Price paid |
| Main output | Full cords |
| Formula | cords = length x height x log length / 128 |
| Cost | Free — no sign-up, no download |
How to use the Firewood Cord Calculator
- 1Stack the wood neatly, then measure the length and height of the stack face.
- 2Enter the log length - this is what turns a face cord into a fraction of a full cord.
- 3Compare the price per full cord against local going rates.
Inputs explained
- Stack length(ft)
- Enter the stack length in ft.
- Stack height(ft)
- Enter the stack height in ft.
- Log length(in)
- Enter the log length in in.
- Price paid($)
- Enter the price paid in $.
Worked example
Using the values the calculator loads with:
Inputs
- Stack length8 ft
- Stack height4 ft
- Log length16 in
- Price paid250 $
Results
- Full cords0.333
- Stacked volume42.67 cubic feet
- Face cords (at this log length)1
- Price per full cord$750.00
- Approx heat value (seasoned hardwood)7 million BTU
- 8 x 4 x 1.33 = 42.67 ft3 / 128 = 0.333 cords
Frequently asked questions
What is a face cord?
A stack 4 ft high by 8 ft long, one log deep. With 16 inch logs that is only one third of a full cord, which is why 'cord' pricing can be misleading.
How much firewood do I need for a winter?
A well-insulated home using wood as the main heat source typically burns 3 to 5 full cords per season.
What do I need to enter into the Firewood Cord Calculator?
Just 4 values: stack length, stack height, log length, price paid. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Firewood Cord Calculator work out the answer?
A full cord is 128 cubic feet of stacked wood (4 x 4 x 8 ft). Divide your stack volume by 128 to get cords. It applies the formula cords = length x height x log length / 128 and shows the working so you can check each step by hand.
Is the Firewood Cord Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.