What Is a Cord of Wood, Really?

A cord of wood is 128 cubic feet of stacked wood, ranked and well stowed, with no separate measurement for the gaps between pieces. That’s not a rule of thumb. It’s the legal definition, set out in NIST Handbook 130 and enforced by weights-and-measures agencies in nearly every state. The reference shape most people picture, a stack 4 feet high, 4 feet deep, and 8 feet long, is just one way to hit that number. Your pile doesn’t need those exact dimensions. It needs the same total volume. A shorter, longer stack works just as well, as long as the math lands on 128 cubic feet.

Cords exist because firewood used to be sold on trust alone, and trust doesn’t scale. A buyer three states away can’t eyeball a seller’s truck bed. A fixed cubic-foot standard means a cord in Vermont and a cord in Montana are the same amount of wood.

How to Calculate a Cord of Wood (Step-by-Step)

The formula is simple: multiply length by height by depth, in feet, then divide by 128. A stack 8 feet long, 4 feet high, and 4 feet deep gives you exactly one full cord. Change any one of those numbers and the cord count moves with it, which is exactly why a calculator beats mental math once your pile isn’t a clean rectangle.

Loose wood, the kind tossed into a truck bed rather than stacked, uses a different formula entirely. Tossed splits don’t pack the way ranked wood does, so a loose pile needs a packing-factor adjustment before you convert it to a cord equivalent. Treating a loose load like a stacked one will overstate how much wood you actually have.

Common Measuring Mistakes That Cost You Money

A sagging or leaning stack reads taller than it actually holds once it settles. Wide gaps from crooked splits inflate your measured volume without adding real wood. And measuring the outside of a truck bed instead of the actual pile height inside it is one of the most common ways buyers overpay without knowing it.

Pro-Tip: The Knock Test. Before you even reach for a moisture meter, knock two splits together. Dry, seasoned wood gives a sharp, hollow crack. Wet wood answers with a dull thud. I learned this the hard way at 9,000 feet with no dry wood left and a fire that wouldn’t take.

Cord vs. Face Cord vs. Rick vs. Half Cord: What’s the Difference?

A face cord is not a fixed size. It’s a row as long and as tall as a full cord, 4 by 8 feet, but only as deep as your split length, so its actual volume depends entirely on how long your pieces are. Cut your splits shorter, and you get more face cords from the same pile. Cut them longer, and you get fewer.

“Rick” is simply a regional name for the same thing as a face cord, not a separate unit with its own math. A half cord is exactly what it sounds like, 64 cubic feet, half of the legal standard. Bundles and truckloads are informal seller terms with no fixed legal size at all, which is exactly why they’re worth converting back to cubic feet before you agree to a price.

How Many Cords of Firewood Do I Need for Winter?

The honest answer is that it depends on four things: your home’s size, your local climate, how well insulated your house is, and how efficient your stove is. A well-insulated 1,500-square-foot home in a mild climate might burn through two cords all season. The same home in a very cold zone, heated primarily by wood through an inefficient open fireplace, can burn five or six times that.

Generic seasonal averages exist, but they average away the exact variables that actually decide your number. A calculator that takes your home size, climate zone, and stove type gives you a planning number worth trusting, rather than a stranger’s guess.

Firewood BTU Output: Which Wood Species Burns Hottest?

Density drives heat output more than species name recognition does. Denser hardwoods pack more burnable material into the same cord, which is why a cord of osage-orange or hickory delivers close to double the heat of a cord of white pine or basswood, even though both piles measure exactly 128 cubic feet. For a hot, long-lasting burn, dense hardwoods like oak, hickory, and black locust are the standard choice. For a quick, easy-starting fire, or for kindling, lighter woods like pine and basswood earn their place too. Neither is wrong. They’re suited to different jobs.

Seasoned vs. Wet Firewood: Why Moisture Changes Everything

Wet firewood burns cooler and dirtier than seasoned wood because a real share of every fire’s heat goes into boiling off water before the wood itself can burn. Properly dried firewood should read 20% moisture or less on a meter. Above that line, you’re paying to heat water, not your home. Seasoning takes real time, not a weekend in the sun. Softwood needs at least six months to dry properly. Hardwood needs closer to twelve. Split your wood early, stack it loosely, and give it exposure to sun and wind, and the calendar does the rest.

Pro-Tip: Stack It Loose, Not Tight. Cramming splits together to fit more wood into a smaller footprint feels efficient, but it kills airflow. A looser, breathable stack dries faster than a packed one, every time.

Is Firewood Cheaper Than Propane or Heating Oil?

Comparing raw price per cord to a propane bill is misleading, because a cord isn’t a fixed amount of heat. The fair comparison is cost per million BTU delivered, which accounts for species, moisture, and how efficiently your stove or furnace actually uses that fuel. Once you normalize both fuels that way, wood often wins on raw dollars, though it rarely accounts for your own labor and time, which isn’t free either.

How Much Does a Cord of Wood Weigh (and How Do You Haul It)?

A cord’s weight swings widely by species and moisture, from around 2,000 pounds for a dry, light species to well over 4,000 pounds for a green, dense hardwood. That weight matters the moment you try to haul it. A full-size pickup bed, loaded level, holds roughly half a cord. A compact truck bed holds closer to a third.

Pro-Tip: Never Buy a Truckload Sight-Unseen. Ask for the seller’s actual bed dimensions before the wood gets dumped, not after. It’s the single easiest firewood scam to spot, and the easiest one to fall for if you don’t ask first.

Firewood Regulations: Are You Getting a Full Cord?

State weights-and-measures agencies exist specifically to enforce the 128-cubic-foot standard, and sellers who advertise loosely defined units without dimensions are the biggest red flag to watch for. If a listing says “truckload” or “rick” with no measurements attached, ask for the actual numbers before you pay, then check them against a calculator once the wood is delivered.

Frequently Asked Questions

How many face cords are in a full cord?

It depends on split length, but with standard 16-inch splits, it takes about three face cords to equal one full cord.

How long does a cord of wood last?

For occasional weekend burning, a cord can last most of a season; for full-time heating, it may last only a few weeks.

Is a rick of wood the same as a face cord?

Yes, “rick” is a regional name for the exact same unit as a face cord.

How much does a cord of wood cost?

Prices vary widely by region and species, typically ranging from $150 to $500 per cord.

How do I know if my firewood is dry enough to burn?

Check for a hollow sound when two pieces knock together, visible cracks in the end grain, and a moisture reading of 20% or less.