Prices to fill a 100 lb propane cylinder depend on therms of propane per gallon, regional service charges, and any delivery fees. Typical cost factors include the 80% fill rule for safety, local fuel prices, and convenience fees from a supplier. This guide presents cost ranges in USD and clarifies how pricing varies.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Propane volume (gallons) | 18.9 | 18.9 | 18.9 | 80% fill of 100 lb cylinder (approx. 23.6 gal max tank); use 18.9 gal for 80% rule |
| Propane price per gallon | $2.50 | $3.20 | $4.00 | Regional variations drive price; ends include tax in some markets |
| Delivery/Service fee | $0 | $15 | $40 | Includes handling and basic tank connection |
| Taxes | $0 | $3 | $6 | State/local tax on fuel or service |
| Total fill cost (USD) | $47 | $61 | $85 | Assumes standard 80% fill and delivery in typical metro/rural markets |
Assumptions: region, specs, labor hours.
Overview Of Costs
Cost to fill a 100 lb propane cylinder varies by the per-gallon price of propane, the 80% fill rule, and any delivery or service charges. The total cost typically ranges from $45 to $85, with an average around $60 in many U.S. markets. The per-gallon basis helps compare prices across providers: 18.9 gallons at $2.50–$4.00 per gallon yields the range shown above.
Notes on per-unit pricing: Propane is commonly priced per gallon; for a 100 lb tank, the practical fill is about 19 gallons, which translates to the numbers in the table. Consumers should expect occasional site fees or minimum service charges, especially for one-time fills.
What Drives Price
Propane market variability is the primary driver. Regional differences in wholesale costs, transportation, and seasonal demand influence price per gallon. For example, colder months often see higher propane use, nudging prices up. Additionally, delivery fees and cylinder handling add to the total.
Technical and service considerations include the 80% fill rule for safety, inspection requirements, and any required valve checks. If the cylinder is out of hydrostatic test, or if a delivery includes valve replacement or certification, costs can shift higher.
Regional Price Differences
Pricing varies by region. In urban centers with higher delivery costs, total fill may lean toward the upper end of the range. Suburban areas often fall near the average, while rural regions with limited competition may see wider spreads, sometimes closer to the low or high ends depending on local dealers. Expect a typical delta of ±10–20% between regions.
Practical regional examples include Northern states with higher fuel taxes and logistical costs,Midwest markets with steady propane access, and Southern states where delivery costs may be lower but demand patterns differ seasonally.
Real-World Pricing Examples
- Basic scenario: 18.9 gallons at $2.50/gal, no delivery fee, tax included as applicable; total ≈ $47. Assumptions: basic refill, local pickup or standard delivery within town.
- Mid-Range scenario: 18.9 gallons at $3.20/gal, $15 delivery, $3 tax; total ≈ $61. Assumptions: standard service, moderate delivery distance.
- Premium scenario: 18.9 gallons at $4.00/gal, $40 delivery, $6 tax; total ≈ $85. Assumptions: remote location, added handling or near-outage pricing.
Cost Breakdown
| Column | Low | Average | High | Notes |
|---|---|---|---|---|
| Materials | $45 | $60 | $80 | Propane volume (80% fill of 100 lb tank) |
| Labor | $0 | $8 | $20 | Manual fill or technician time not always billed separately |
| Delivery/Installation | $0 | $15 | $40 | Distance-based or flat fee |
| Taxes | $0 | $3 | $6 | State/local charges |
| Permits/Fees | $0 | $0 | $0 | Typically not required for residential refills; check local codes |
| Contingency | $0 | $2 | $5 | Small buffer for unusual handling |
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Ways To Cut Costs
Shop around and compare propane prices between local suppliers and big-box gas distributors to find the best per-gallon rate, especially during off-peak seasons. Bundle services when possible, such as combining tank inspection with a fill to reduce separate trips. Be mindful of minimum delivery charges that may negate savings on small fills.
Plan fills with your cycle to avoid emergency charges during high-demand periods. If you have a seasonally low-use window, align fills with that period to minimize per-fill costs from delivery surcharges or unplanned service calls.
Assumptions: region, specs, labor hours.
