Firewood Cord Calculator

A full cord is 128 cubic feet of tightly stacked wood, the volume of a neat pile 4 feet high, 4 feet deep and 8 feet long. It is the legal standard unit for buying firewood in most of the United States.

Stack the wood as tightly as you can, then measure the length, height and depth in feet. Multiply the three together for cubic feet, then divide by 128 for cords. This tool does the arithmetic for you.

All three inputs are in feet, and each field steps in half-foot increments. If you have inches, divide by 12 first, so a 16 inch log depth becomes about 1.33 feet.

A face cord is 4 feet high and 8 feet long but only as deep as the log length, so a 16 inch face cord is about a third of a full cord while a 24 inch one is half. Because depth is not standardized, this tool reports full cords only.

Loosely thrown wood traps a lot of air, so a truck load measures larger dumped than it does stacked. Always stack the wood before measuring to get an honest cord count.

No. A cord is a measure of stacked volume, not weight, so it is the same 128 cubic feet for oak, pine or any species. Denser woods simply weigh more and give off more heat per cord.

This tool assumes a roughly rectangular stack, so it multiplies length by height by depth. For a cone or dome shaped pile the box formula overstates the volume, so restack it into a rectangle for an accurate reading.

The volume is exact for the box you measure, so accuracy comes down to how tightly and evenly you stack. Crooked splits and bark leave gaps that count as wood volume, so a neat stack gives the fairest count.

Yes. The calculation runs entirely in your browser and nothing is sent to a server, so your measurements stay on your device.