Firewood Calculator

Fire pit planning: per night, per month, per season

How Much Firewood for a Fire Pit? Per Night, Per Season, With Real Numbers

How much firewood do you need for a fire pit? For an ordinary evening, less than you think and more than a store bundle holds. A standard backyard pit burns through about 8 to 15 splits of seasoned hardwood over 3 to 4 hours. The range is wide because fire pits are not furnaces: nobody runs them at a steady output, and a fire that is mostly for looking at burns differently from one people are huddled around in November.

The per-night number

Start with the pit. A 24 to 30 inch pit holds two or three splits at a time and needs a fresh one every 20 to 30 minutes once it is going. Over four hours, that is 8 to 12 splits, plus two or three to build the starting fire. A bigger 36 inch pit takes larger splits and more of them: figure 12 to 18 for the same evening. A long night, five or six hours with a big flame, can eat a quarter to a third of a face cord, which is why people who buy bundles run out halfway through the party.

Bundles deserve a warning. A grocery store or gas station bundle holds 4 to 6 small splits and burns for roughly 1 to 2 hours. A 4 hour evening takes 2 to 4 bundles, and at $5 to $10 a bundle you have spent $20 to $40 on one night of fire. A face cord of split hardwood, typically $80 to $200 depending on region and species, holds the equivalent of 15 to 25 bundles. If you have a fire pit night more than twice a month, bundles are the most expensive way to do this.

What changes the burn rate

Species matters most. Dense hardwoods, oak, hickory, maple, ash, burn slower and hold a coal bed, so you feed the fire less often. Softwoods like pine and fir burn fast, spark more, and need constant feeding; expect to burn roughly twice as much softwood for the same evening. Moisture matters more than species, though. Wood above 20 percent moisture spends its heat boiling off water, burns cool, smokes, and seems to vanish. A moisture meter reading under 20 percent is the single best predictor of a fire that lasts.

Weather is the other multiplier. A cold, windy night can double consumption: wind feeds the fire and strips heat, and cold guests want a bigger flame. Cooking over the pit adds wood too, since you keep the fire hot and steady instead of letting it settle to coals. My rule of thumb is to bring 50 percent more wood than the calm-night estimate whenever the temperature drops below 50 or the wind picks up. Running out at 9 p.m. is worse than carrying a few extra splits.

The season math

Fire pit habitNightsFirewood needed
Once a month, Apr to Oct7About 1 face cord
Every other week, Apr to Oct141 to 2 face cords
Weekly, Apr to Oct282 to 3 face cords
Weekly, year-round521 to 1.5 full cords

A face cord is a stack 4 feet high and 8 feet long of 16 inch splits, about a third of a full cord. For the weekly April to October crowd, a single full cord covers the season with room for guests and long nights. Buy it in spring, stack it for airflow, and by the time fire pit season peaks the wood is dry. Our guide to stacking firewood so it seasons faster covers the method, and how to tell if firewood is seasoned covers the tests.

Safety note. Never leave a fire pit burning unattended, and never burn treated, painted, or pressure-treated wood. The chemicals in treated lumber release toxic fumes. If you are unsure what a piece of wood is, leave it out of the pit.

A simple buying rule

If you have fire pit nights twice a month or more, buy by the cord, not the bundle. A full cord of seasoned hardwood, $150 to $350 in most regions, is the cheapest fire you will ever have, and it removes the mid-party trip to the gas station. If you have a pit night a few times a summer, a face cord from a local seller is the sweet spot. Either way, check the moisture before you pay, and run your numbers through the firewood calculator to convert between cords, face cords, and bundles for your pit size.

Frequently Asked Questions

How much firewood do I need for a fire pit per night?

For a 3 to 4 hour evening in a standard 24 to 36 inch pit, plan on 8 to 15 splits of seasoned hardwood. A long 5 to 6 hour night with a big fire can use a quarter to a third of a face cord. Start with a dozen splits and add as needed.

How many bundles of firewood equal a fire pit night?

A store bundle usually holds 4 to 6 small splits and burns about 1 to 2 hours. A 4 hour evening takes 2 to 4 bundles. Bundles are the most expensive way to buy firewood, so regular fire pit users should buy by the face cord or full cord instead.

Does hardwood or softwood last longer in a fire pit?

Hardwood lasts longer and holds a coal bed. Oak, hickory, maple, and ash burn slower and hotter than pine or fir. Softwood burns fast, sparks more, and needs constant feeding, so you will burn roughly twice as much of it for the same evening.

How much firewood do I need for a whole season of fire pit nights?

One night a week from April through October is about 28 nights. At roughly 10 to 15 splits a night, that is 280 to 420 splits, or about 2 to 3 face cords. Buy a full cord and you will have room for extra guests and longer nights.

Size your firewood order for your pit, your season, and your species.

Open the Firewood Calculator

Burn rates are planning estimates for seasoned hardwood in a typical backyard pit. Actual use varies with pit size, species, moisture, wind, and how hot you keep the fire.