Fire Pit Fuel Cost: Do the BTU Math

The arithmetic nobody shows: BTU to dollars per hour

A tank runs out mid-evening and nobody can say why. Every article you read about fire pit fuel cost quoted $1.80 to $3.20 an hour, so a 20-lb tank should have lasted a week of evenings. It did not — and one reason is that the published band comes with no burner size attached at all.

Here is the arithmetic. DreamCast Design and Production puts it another way: a gallon delivers roughly 95 hours at 1,000 BTU/hr, which means a 30,000 BTU pit empties a gallon in about 3.17 hours. Divide your burner's rating by the BTU content of a gallon to get gallons per hour, then multiply by whatever your local rate per gallon is. That is the whole formula. No source in the published guides states how many usable gallons a 20-lb tank holds.

Where the published numbers stop

The one worked example any source supplies is DreamCast's: at 30,000 BTU a gallon lasts about 3.17 hours. Beyond that, no published source gives gallons per hour by burner size, and none gives hours per 20-lb tank at a stated BTU rating, so the rest of the table cannot be built from the available figures.

Starfire Direct does not say which burner size its $1.80–$3.20 range assumes, so the band cannot be tied to any particular BTU rating — including yours. Treat it as a general figure rather than a prediction for a specific pit.

What pulls the real cost down

Two things pull the real figure back down. Nobody runs a dial at maximum all evening, and Elementi's sizing guide notes that 25,000–45,000 BTU already serves two to four people at a 60–90 cm bowl — with a glass wind guard cutting the required rating by about 10% and a square or rectangular table by 5–10%. Output you never use costs nothing. Output you bought and do use costs exactly what the table says.

The short version

• The pick: Outland Living Firebowl, for propane running costs: 58,000 BTU on a refillable 20 lb tank.
• Also worth it: Ninja Fireside360, for the high-output propane case — 80,000 BTU burns fuel fastest per hour.
• How this was decided: published specifications and buyer reports across 11 products, compared below.

Wood costed per hour, three ways

Wood is priced by volume, not by heat, which is why nobody puts it on the same axis as propane. Here is the arithmetic anyway.

Start with the burn rate. No published source gives a splits-per-hour burn rate for a bowl of any size, so any hourly wood figure starts from an estimate rather than a measurement. DreamCast Design notes that wood burns hotter than propane but only while you keep feeding it — the hourly figure is a feeding rate, not a fuel tank.

Three supply routes, same pit, same hour:

Bundles bought at a grocery store are the priciest way to buy wood by volume, though no published source here gives a bundle price, a bundle volume, or how long one lasts in a pit of a given size.

Ovios says wood has the lowest ongoing fuel cost of the six fuel types, especially bought in bulk or gathered free — but no source here quantifies the bulk discount, gives a price per cord, or defines cord dimensions.

Self-cut and seasoned costs your Saturday and a chainsaw. Decoro Outdoor puts seasoning at six months or more of drying. Fuel cost per hour approaches zero. Ovios flags the hidden cost: a dry, covered storage space, or the stack goes mouldy.

Where these numbers are assumption rather than sourced price: essentially all of them. No source in the published guides prices wood or measures how fast a pit consumes it. What is sourced is the direction of travel — Elementi notes bigger wood pits hold more wood for a longer fire, and larger burn areas mean higher consumption — so sanity-check any hourly figure against your own pit.

Product	Product Dimensions	Material	Item Weight	Color	Right for
Outland Living Firebowl	24"D x 24"W x 13"H	Alloy Steel, Stainless Steel	34 pounds	Black	Best for fire bans
Ninja Fireside360	—	—	40 pounds	Stone	Best no-ember option
Solo Stove Yukon	29"D x 29"W x 18.5"H	Stainless Steel	40.4 pounds	Ash	Best for big groups
Solo Stove Bonfire	19.49"D x 19.49"W x 17.52"H	Stainless Steel	21.7 pounds	Ash	Best small-yard option
Breeo X	34"D x 34"W x 14"H	Corten Steel	28.12 kg	Corten Steel	Best permanent placement
Cuisinart	24.5"D x 24.5"W x 17"H	Alloy Steel, Stainless Steel	22 pounds	Cleanburn Fire Pit	Best wind protection
TIKI Patio	24.75"D x 24.75"W x 18.75"H	Stainless Steel	—	Black	Best stated heat zone
Solo Stove Mesa	7"D x 7"W x 8.6"H	Stainless Steel	2.3 pounds	Gunmetal	Best tiny spaces
Fireside Outdoor	24"D x 24"W x 15"H	Stainless Steel	8 pounds	Silver	Best leave-no-trace
PACKFIRE 17"	17"D x 17"W x 22.4"H	Aluminum, Stainless Steel	27.5 pounds	Black	Best carried in
Breeo Smokeless	34"D x 34"W x 14"H	Stainless Steel	31 pounds	Stainless Steel	Best repositionable pit

Every spec above is quoted from the listing; the “Right for” column is our judgement.

Which one is yours

• Need global trade identification number under 00869179000293? → Breeo Smokeless
• Around 00869179000293 is enough? → Fireside Outdoor
• Need every bit of global trade identification number you can get? → Ninja Fireside360

Two corrections that move the number more than fuel choice does

Nobody runs a large burner at full output all evening. The dial exists precisely so you don't. Turn that burner down and the fuel draw falls with it. StarFire Direct's figure of $1.80 to $3.20 per hour, quoted everywhere, does not say what output it assumes, so it should not be read as either a maximum-output or a typical-use number for any specific pit.

Turning a burner down cuts fuel draw roughly in proportion to output, so the spread inside a single throttleable appliance can be wide. Putting numbers on it would require a per-gallon propane price and a BTU-per-gallon figure, and no published source here supplies either — nor is cordwood priced anywhere, so the two cannot be compared directly.

The second correction concerns how you buy the gas. Starfire Direct notes propane is sold in 20-lb tanks, with 40-lb tanks also available, and Ovios puts the recurring cost as refills or exchanges — but no published source here compares the fill weight or price of an exchange cylinder against a dealer refill, so the size of any penalty is unknown.

Warmbond gives 8 to 20 hours per tank for tabletop use, without attaching a tank size or attributing the spread to any one cause. Throttling is the lever.

Does a gas line ever pay for itself?

Whether a natural gas line pays for itself depends on how much you burn, and the published sources cannot settle it. Starfire Direct reports one line-and-hookup install at about $2,300, trenching through pavers included — a single anecdote about one neighbour's yard, not a typical or range figure, since no source gives a per-foot trenching rate or permit cost. That is the number the break-even below has to clear.

Work it as savings per hour. Nobody in the published sources gives a natural gas hourly rate for a fire pit, so the honest answer is a range rather than a figure. Assume the gas burn saves you $1 an hour against propane, and $2,300 would take 2,300 burn hours to recover; assume $2 an hour, and 1,150. Both savings rates are illustrative only — no source supports either.

Now convert that to evenings. At three hours a burn, four burns a month, you log 144 hours a year. On the illustrative $1–$2 an hour savings above, break-even would land at 8 to 16 years; at two burns a month, 16 to 32 years; at one burn a month, 32 to 64 years. Those spans stand or fall entirely on a savings rate no source supplies, so treat them as a shape of the problem rather than an answer.

The case for gas is not the arithmetic. It is that there is no tank to swap, no cylinder taking up clearance, and the cost lands on the utility bill instead of a Saturday errand. AuthenTeak notes it also needs a certified professional to make the connection, which is where the permits and the trenching cost come from.

Outland Living Firebowl — Best for fire bans

• CSA approved and spark-free, usable during most campfire bans
• No assembly or tools; 24-inch bowl only 13 inches tall
• But: 58,000 BTU is lower output than the pedestal propane unit
• But: Propane tank is not included and needs its own clear space

Ninja Fireside360 — Best no-ember option

• Runs on propane, so there are no wood sparks or ash to clear
• Three modes — flame only, heat only, or both — for different conditions
• But: Requires a propane cylinder, which itself needs clearance from the flame
• But: 28.8 in tall pedestal puts the flame near face height for seated guests

Solo Stove Yukon — Best for big groups

• 27-inch bowl with 360-degree airflow, sized for six or more
• 304 stainless steel with a high-heat ceramic coating
• But: 29" x 29" x 18.5" and around 44 pounds, the largest and heaviest wood pit here
• But: A bigger fire means the clearance ring around it grows accordingly

Solo Stove Bonfire — Best small-yard option

• 21.7 pounds and 19.49 inches wide, light enough to move single-handed once cool
• Includes the stand and a removable ash pan and base plate
• But: Sold without the lid and shelter included in the bundle version
• But: 17.5 inches tall puts the flame at seated-face height in close quarters

Breeo X — Best permanent placement

• Corten steel body with double-wall construction and secondary combustion holes for a low-smoke burn
• X Airflow design feeds oxygen to the fire for fast ignition
• But: At roughly 62 lb it is not something to reposition once seating is set
• But: 34 in overall diameter means the required clearance ring is measured from a wide base, not the bowl

Cuisinart — Best wind protection

• Wind guard is included rather than sold separately
• Takes logs or chunks up to 18 in, so bundled firewood needs no cutting
• But: Alloy steel with an enamel-coated exterior is more prone to chipping than bare stainless
• But: 24.5 in diameter needs a genuinely open clearance ring

TIKI Patio — Best stated heat zone

• Radiant zone is quoted at about 4 ft, a usable starting point for chair placement
• 16-gauge stainless with a black powder-coated finish
• But: Powder coat can discolour around the rim with repeated hot burns
• But: Item weight is not stated on the listing

Solo Stove Mesa — Best tiny spaces

• 7 in footprint fits where a full pit could never meet clearance rules
• 2.3 lb, folds down, and ships with a nylon carry bag
• But: Output is ambience rather than heat for a seating circle
• But: Small fuel chamber needs topping up constantly

Fireside Outdoor — Best leave-no-trace

• Fire mesh holds fuel off the ground and is claimed to cut smoke by up to 80%
• 7 to 8 lb and collapses into a zippered weather-resistant bag
• But: Heat shield needed for fires on any surface is sold separately and not included
• But: Mesh burn platform is a wear item under repeated heavy loads

PACKFIRE 17" — Best carried in

• Folds flat into its own backpack with internal dividers and a kickstand leg
• Tool-free QuickDraw legs interlock in seconds
• But: 27.5 lb is heavy for a backpack-carried item despite the format
• But: Legs raise it to 22.4 in tall, so it is top-heavy on soft ground

Breeo Smokeless — Best repositionable pit

• 21 in bowl at 31 lb is manageable to relocate as clearances change
• Stainless steel resists weather for a pit left out between uses
• But: Listed overall dimensions of 34 in square make its ground footprint much wider than the 21 in bowl
• But: Smaller firebox holds less wood, so refuelling is more frequent

When the cheap fuel costs the most — and which pit suits which bill

Cheap fuel has conditions attached.

Wood wins on paper and then fails on specific evenings. Propane wins on convenience and loses more heat per dollar than the hourly bands admit. Here is where each one voids its own arithmetic:

• Burn-ban days. A wood pit at zero fuel cost is worth nothing on a no-burn day, whereas a propane bowl runs without embers or sparks — though no published source here addresses which pits are permitted under specific burn bans, and no CSA or other standard is named for any fire pit in these sources.
• Unseasoned or rained-on wood. Ovios notes the hidden cost beyond the wood is a dry, covered storage space, without which the supply goes mouldy, and Decoro describes seasoned wood as dried typically six months or more. No source quantifies what wet wood costs per usable BTU.
• HOA and lease rules. Where solid fuel is banned outright, the propane figure is the only figure. Sources here give no clearance data for tabletop models, though DreamCast recommends a minimum 15" clearance to seating for gas and propane pits generally.
• Running dry at 9pm. Ovios puts propane's real recurring cost as refills or exchanges plus finding an open supplier mid-gathering. Wood has no equivalent failure.
• Delivered heat, not rated heat. Ebyland states plainly that propane fires give off less heat than wood, and DreamCast says wood burns hotter but must be fed constantly. Price per delivered BTU rather than rated BTU if you can — though neither source supplies heat figures per unit or per dollar, so the size of propane's disadvantage cannot be quantified from them.
• The wrong orifice. Starfire Direct describes a propane setup that sputtered out because the pit was built for natural gas. Check LP against NG on the spec sheet before you blame the tank.

Burning most weekends with your own split wood, the running cost is low enough to stop counting — Ovios and AuthenTeak both put wood at the cheapest end to operate. Burning occasionally, under restrictions, take the propane and accept the heat penalty.

Which returns to that tank. It likely did not fail: a burner consumes fuel in proportion to its rating, and the published hourly bands are not tied to any particular rating — nobody had done the division. Check your fire pit clearance distances next — DreamCast notes high-BTU models demand more overhead room, a recommended minimum of 84 inches to non-combustible structures.

Our call

Outland Living Firebowl, best for propane running costs: 58,000 BTU on a refillable 20 lb tank.

A different situation changes the pick:

• For the high-output propane case — 80,000 BTU burns fuel fastest per hour: Ninja Fireside360.
• For largest wood burner, biggest log appetite per hour: Solo Stove Yukon.
• For mid-size wood fire pit with the most predictable cordwood burn rate: Solo Stove Bonfire.

One caveat on the Outland Living Firebowl: 58,000 BTU is lower output than the pedestal propane unit