Propane cylinder refill prices typically run $15-$30 for a standard 20-pound grill cylinder, with many customers paying about $20-$25 before tax. The final charge depends on how much propane is added, local per-gallon rates, cylinder size, and whether the station has a minimum service fee.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| 20-pound cylinder refill | $15 | $22 | $30 | Usually about 4.0-4.7 gallons when nearly empty |
| Propane price per gallon | $3.00 | $4.50 | $6.00 | Retail cylinder-fill rate; varies by location and season |
| 20-pound exchange | $20 | $25 | $32 | Replaces the cylinder rather than filling the customer’s own |
| 100-pound cylinder refill | $55 | $90 | $130 | Price depends on gallons added and delivery or handling charges |
What a 20-pound propane cylinder refill usually costs
A standard 20-pound grill cylinder generally costs $15-$30 to refill, and a typical full fill is around $20-$25. The cylinder can hold about 4.7 gallons of propane when filled to the permitted 80% capacity; stations commonly charge by gallons dispensed rather than by cylinder size.
A partly full cylinder costs less to top off. For example, adding 2 gallons at $4.50 per gallon costs about $9 before tax or a minimum charge. A nearly empty cylinder may take 4.0-4.7 gallons, depending on residual fuel and the technician’s fill procedure.
For a common 20-pound cylinder, budgeting $22-$25 is a practical starting point, not a guaranteed flat rate. Prices above $30 can occur in high-cost areas, at convenience-focused locations, or when a minimum fee applies.
Assumptions: Standard portable cylinder, retail fill station, no delivery, and a near-empty cylinder. Local taxes and fees may add to the total.
How propane, labor, and service charges appear on a refill quote
Most walk-in refill stations charge for the propane dispensed. Some also use a minimum charge, cylinder inspection fee, or other service fee. Unlike an exchange, a refill normally does not include a new cylinder, so the customer keeps the same tank.
| Quote component | Typical charge | What changes it | Common application |
|---|---|---|---|
| Propane dispensed | $3.00-$6.00 per gallon | Local supply, retailer pricing, and season | About $12-$28 for 4.0-4.7 gallons |
| Fill service labor | $0-$8 per cylinder | Station policy and staffing | May be included in the per-gallon rate |
| Minimum charge | $5-$15 per visit | Retailer policy and small fills | Can make a partial fill less economical |
| Inspection or recertification | $0-$25 | Cylinder condition and date marking | Some stations decline expired or damaged cylinders |
| Taxes and local fees | $0-$4 on a typical fill | State and local rules | May be added at checkout |
Labor is often bundled into the rate instead of billed by the hour. Where a labor charge is itemized, station staff may spend only a few minutes on a routine fill, but checking the cylinder, weighing it, and addressing access or valve issues can add time.
Ask whether the posted per-gallon price includes handling and whether a minimum applies. Those details matter most when the cylinder is not empty and the customer wants only a small amount.
Why cylinder size and fill level change the price
Capacity determines the maximum amount of propane a cylinder can safely hold, while its starting fill level determines how many gallons the customer buys. The familiar 20-pound designation refers to the propane weight when full, not the cylinder’s total weight with the steel tank included.
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20-pound cylinder: Holds about 4.7 gallons at an 80% fill. A near-empty refill commonly costs $15-$30.
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30-pound cylinder: Holds about 7 gallons at capacity. A near-empty refill may cost $22-$42 at $3-$6 per gallon, before possible fees.
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40-pound cylinder: Holds about 9.4 gallons at capacity. A full refill may run roughly $28-$56 before tax or service charges.
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100-pound cylinder: Holds about 23.6 gallons at capacity. A fill can cost about $70-$142 at the same per-gallon range, although delivery pricing may differ.
The 80% fill limit leaves room for propane to expand as temperatures rise. A cylinder that is not empty may accept substantially less than its maximum capacity. Tank weight, gauge readings, and fuel remaining can provide clues, but the station’s scale or dispensing meter determines the amount charged.
For larger cylinders, estimate the cost by gallons added rather than by the tank’s nominal pound rating. A 100-pound cylinder that needs only 10 gallons should cost far less than one filled close to capacity.
How refill rates differ across U.S. regions and seasons
Retail cylinder-fill pricing is local, and a station’s convenience, competition, and supply arrangements can matter as much as broad regional averages. A $3-$4 per-gallon rate may be available in some lower-cost markets, while urban areas, resort communities, and remote locations can reach $5-$6 or more.
As a planning estimate, customers in lower-cost rural or central markets may find rates about 10%-20% below a local metropolitan benchmark. Busy coastal cities and tourist areas can be 10%-25% higher than nearby lower-cost locations. These are comparison ranges, not fixed regional tariffs; neighboring retailers can quote different prices.
Demand can also influence retail pricing. Grill season and holiday weekends may bring longer lines or fewer promotions, while cold-weather demand can affect supply and delivery costs in some markets. A walk-in refill station may hold its price steady, but customers should check current posted rates rather than rely on a national average.
Comparing two nearby refill stations is often more useful than comparing a local quote with a national per-gallon estimate. Confirm both the rate and any minimum, because a cheaper gallon price may not produce the lowest total for a small fill.
Refilling versus exchanging a 20-pound grill cylinder
Refilling and exchanging are different purchases. A refill adds propane to the customer’s cylinder, while an exchange typically trades it for a cylinder supplied by the retailer. Exchange pricing usually covers a set amount of propane and the convenience of a ready-to-use tank, but the amount of fuel can vary by provider.
| Option | Typical price | Fuel or service included | Cost consideration |
|---|---|---|---|
| Refill own 20-pound cylinder | $15-$30 | Propane added, often up to about 4.7 gallons | Often lower per gallon when the cylinder is nearly empty |
| Exchange 20-pound cylinder | $20-$32 | Replacement cylinder, with fuel amount set by retailer | Convenient, but may provide less than a full 4.7 gallons |
| Buy a new cylinder | $35-$70 | New cylinder; propane may be separate | Useful when the existing tank is damaged or unusable |
Exchange can be practical when the cylinder is out of date, the customer does not want to wait for service, or a retailer is nearby. Refill is often less expensive when the existing cylinder is sound and the station charges a competitive per-gallon rate. An exchange may not be a good deal if the replacement contains substantially less propane than a full fill.
Compare the exchange’s included fuel with the refill station’s actual gallons and total charge. A $25 exchange is not directly equivalent to a $25 refill if the two options provide different amounts of propane.
Three realistic refill quotes for different cylinder sizes
The examples below use different fill amounts and rates to show how gallons, not just tank size, drive the bill. They exclude sales tax unless noted and assume no delivery. Local service charges can change each total.
| Scenario | Fill and rate | Estimated total | Why it differs |
|---|---|---|---|
| Nearly empty 20-pound grill cylinder | 4.4 gallons × $4.25 | $18.70-$24 | Rate total plus up to $5 in local fees |
| Partly full 30-pound cylinder | 3.5 gallons × $5.00 | $17.50-$28 | Small fill may trigger a minimum or handling charge |
| Nearly empty 100-pound cylinder | 20 gallons × $4.00 | $80-$110 | Higher volume; a delivery or handling fee may apply |
For a rough quote check, multiply the estimated gallons needed by the posted per-gallon rate, then add the retailer’s stated fees and applicable tax. For instance, 4 gallons at $4.50 per gallon gives a propane charge of $18. If a $7 minimum service fee applies, the subtotal becomes $25 before tax.
Use the expected fill amount in a quote comparison, not the cylinder’s full-capacity figure. A partially full tank can make two otherwise similar quotes look different because the stations may dispense different volumes.
When delivery, cylinder age, and access add to the bill
Portable cylinders are commonly refilled at a retailer, but larger cylinders may require a scheduled service visit. Delivery charges can add roughly $10-$40 for a local stop, with higher fees possible for remote addresses, rush appointments, or small deliveries. Some suppliers waive or reduce the fee when several cylinders are filled together.
Condition can affect whether a station will fill a cylinder at all. A damaged valve, severe rust, visible dents, or an unreadable collar date may lead staff to refuse service. Many portable cylinders require requalification after a specified period, commonly 12 years after manufacture and then at intervals set by the applicable method and rules. Recertification availability and pricing vary, and replacement may be more practical than paying for inspection and repair.
Access matters more for delivered cylinders than for a walk-in grill tank. Stairs, locked gates, long carrying distances, or an inaccessible tank location can require extra labor or prevent a routine delivery. The supplier should confirm the site conditions and fees before scheduling.
Check the cylinder’s condition and date before driving to a fill station. A refused fill can mean another trip, while an older or damaged cylinder may make exchange or replacement the more economical choice.
Ways to lower the refill price without sacrificing safe filling
Price control starts with comparing the complete charge. Check the per-gallon rate, minimum fee, taxes, and whether the station fills customer-owned cylinders. If the tank is nearly empty, a lower rate usually matters more; for a small top-off, a minimum charge can outweigh a modest per-gallon discount.
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Call before traveling: Confirm the current price, hours, accepted cylinder types, and whether the station fills a customer-owned tank.
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Combine fills: When several eligible cylinders are due, one trip can reduce time and may avoid repeated minimum charges. Ask whether the station applies a separate fee to each cylinder.
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Choose a convenient refill station: A distant low-price location may not save money after fuel and travel time are included. Compare the total trip cost with the price difference.
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Avoid unnecessary replacement: If a cylinder is sound, in date, and accepted by the station, refilling it can cost less than buying a replacement tank.
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Do not seek an unsafe overfill: The 80% capacity limit allows for expansion. A price deal should never depend on bypassing inspection or safe filling procedures.
Customers should not attempt to refill a portable cylinder from a home tank or transfer propane between cylinders unless using a properly approved service and equipment. Leaks, overfilling, and incompatible connections create serious fire and injury risks.
The most reliable savings usually come from avoiding extra fees and comparing the same fill amount across stations. A small difference in the posted gallon rate can matter, but safe handling and an acceptable cylinder remain essential.