The short version
Run your own numbers in the calculator. At the defaults — 2 sessions a week, 30-minute sessions, an $18.00 refill on an 18-hour tank, $15.00 charcoal with 4 lb a cookout, a $350.00 gas grill and a $150.00 charcoal grill — gas costs $0.50 a session and $26.00 a year, charcoal $3.75 a session and $195.00 a year. Gas saves $169.00 a year on fuel. But year 1, with the grill, is $376.00 for gas against $345.00 for charcoal, so charcoal wins year 1 by $31.00. The $200.00 premium pays back in 62 sessions. Charcoal also costs about 10 extra minutes a session in preheat — 8.7 hours a year — and sears hotter, around 700°F against gas at 500–550°F.
The fuel math, in plain words
Gas is a rate times a time: an $18.00 refill on an 18-hour tank is $1.00 an hour, and a 30-minute session is half an hour, so gas costs $0.50 a session — $26.00 a year at 52 sessions. Charcoal is a price per pound times pounds per cookout: a $15.00 bag of 16 lb is $0.94 a pound, and 4 lb a cookout is $3.75 a session, $195.00 a year. Gas saves $3.25 a session, $169.00 a year. Session length moves gas, pounds per cookout moves charcoal, and sessions a year moves both. A 20-lb refill runs $15–$20 in 2026 and lasts 18–20 hours; a 16-lb bag of Kingsford is $14.99 at Tractor Supply.
Why year 1 feels wrong
Gas saves $169.00 a year on fuel, yet it loses year 1 by $31.00 — and both are true. Fuel is a steady drip: $0.50 a session for gas, $3.75 for charcoal, every session, forever. The grill is a lump up front: $350.00 against $150.00. After 52 sessions, gas has cost $26.00 in fuel and charcoal $195.00 — but the gas grill started $200.00 behind, so the totals are $376.00 against $345.00. After 62 sessions the totals cross. Judge over the life of the grill, not the first year.
Every branch, checked
The fuel winner never flips. At 1 session a week (26 a year), gas costs $13.00 a year, charcoal $97.50, and gas saves $84.50. At 4 sessions a week (104 a year), gas costs $52.00, charcoal $390.00, and gas saves $338.00. With an exchange tank at $22 for 15 lb — about 13.5 hours — gas costs $0.81 a session, $42.37 a year, and the saving shrinks to $152.63. With charcoal on sale at $10 a bag, charcoal costs $2.50 a session, $130.00 a year, and the saving shrinks to $104.00. Neither branch flips the fuel answer.
| Scenario | Gas | Charcoal | Saving |
|---|---|---|---|
| Defaults, 52 sessions a year | $26.00 | $195.00 | Gas saves $169.00 |
| 1 a week, 26 a year | $13.00 | $97.50 | Gas saves $84.50 |
| 4 a week, 104 a year | $52.00 | $390.00 | Gas saves $338.00 |
| Exchange tank, $22 | $42.37 | $195.00 | Gas saves $152.63 |
| Charcoal on sale, $10 | $26.00 | $130.00 | Gas saves $104.00 |
| Year 1, with grill | $376.00 | $345.00 | Charcoal wins by $31.00 |
Session frequency decides everything
The saving per session is always $3.25 at the defaults, so the only question is how many sessions you run. A once-a-week griller saves $84.50 a year, and the $200.00 premium takes 62 sessions — more than two years at that pace — to pay back. A twice-a-week griller saves $169.00, and the premium pays back in about 1 year 2 months. A four-times-a-week griller saves $338.00, and the premium pays back in about 7 months. If the grill will run 62 sessions before you replace it, gas wins on total cost. If you already own one of the two grills, the fuel saving is pure profit from the first session.
Preheat and sear: the time and flavor counterpoint
Fuel is not the whole story. Gas is ready in about 10 minutes — turn the knob, wait, cook. Charcoal takes 20–25 minutes with a chimney starter: light it, wait for the coals to ash over, spread them, wait for the grate to heat. That is about 10 extra minutes a session, or 8.7 hours a year at 52 sessions — a real cost in weeknight time, even if it is not on the receipt. Charcoal answers with heat: a charcoal bed runs around 700°F and up, against gas at 500–550°F, so it sears steaks harder and faster, and the smoke adds a flavor gas cannot copy. Gas answers with control: a dial holds a steady temperature for an hour.
What the model leaves out
Three gaps are worth knowing. First, the grill is a one-time cost here, but grills wear out: gas grills need burners and igniters over time, charcoal grills need grates. Second, the extras are excluded — a chimney starter, lighter fluid or fire starters, a propane tank purchase at about $30–$50, and the charcoal a smoker or a large grill uses beyond 4 lb a cookout. Third, prices are the defaults you enter, not a market survey: a refill is $15–$20 and a bag is $15–$18, but your store and your season will differ.
Who should pick which
Pick gas if you grill often and on weeknights: it saves $169.00 a year on fuel at the defaults, is ready in 10 minutes, and holds a steady temperature with a dial. Pick charcoal if you grill rarely, want the hottest sear and smoke flavor, or want the cheaper grill — charcoal wins year 1 by $31.00 at the defaults, and at 1 session a week the gas premium takes more than two years to pay back. If you already own one of them, keep it.
Verdict
Default to gas if you grill twice a week or more, and to charcoal if you grill once a week or less and love a hard sear. At typical settings gas saves $169.00 a year on fuel — $26.00 against $195.00 — but charcoal wins year 1 by $31.00, $345.00 against $376.00, and the $200.00 premium takes 62 sessions to pay back. The saving survives every branch. Charcoal's real case is the 700°F sear, the smoke, and the $150.00 grill. Gas's real case is the 10-minute start and the steady dial. Buy the gas grill for the weeknights, keep a charcoal kettle for the steaks, and count 62 sessions before you decide.
Bright Side Kit. "Gas vs Charcoal Grill Guide: Cost, Flavor & Which to Buy." https://brightoolbox.com/guides/gas-vs-charcoal-grill-guide/ Accessed October 24, 2026.