Firewood Cord Calculator
Measure a firewood stack into full cords, face cords, and cubic feet, plus the heat content by wood species in million BTU. Calculates in your browser.
Firewood volume
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Show the math
A full cord is a stacked 4 × 4 × 8 ft pile, 128 cubic feet:
cubic feet = length × height × depth
cords = cubic feet ÷ 128
A “face cord” is one piece-length deep, so its size depends on how long the logs are cut. Heat content assumes seasoned, dry wood. All math runs locally in your browser.
What this does
A firewood cord calculator measures a firewood stack into full cords, face cords, and cubic feet, plus the heat content by wood species in million BTU.
How to use it
- Enter the stack width, height, and depth.
- Choose the wood species.
- Read full cords and face cords.
- See the heat content in million BTU.
How it works
A full cord is 128 cu ft of stacked wood; a face cord is one log-length deep. Dense hardwoods pack the most BTU per cord.
full cord = 128 cubic feet (4 × 4 × 8 ft)
Understanding your result
A full cord is 128 cubic feet of stacked wood; a face cord is only one log-length deep, so it can be a third of that or less, which is where buyers get short-changed. Dense, well-seasoned hardwoods pack far more heat per cord than softwoods, so compare price against BTU, not just volume.
Example
A stack 4 ft high, 8 ft long, and 16 inches deep is about a third of a cord.
Sources & methodology
Last updated .
Frequently asked questions
What is a full cord?
A full cord is a tightly stacked pile measuring 4 ft × 4 ft × 8 ft, 128 cubic feet of wood, air gaps included.
What is a face cord?
A face cord is 4 ft high and 8 ft long but only one piece-length deep, so its size depends on how long the logs are cut.
Which wood gives the most heat?
Dense hardwoods like hickory and oak pack the most BTU per cord; softwoods like pine give less and burn faster.
Is anything stored?
No. Everything is calculated locally in your browser.
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