A 45 kg gas bottle, roughly equivalent to a U.S. 100 lb propane cylinder, typically costs $85-$160 to refill, with an average near $120. The final price depends on gallons dispensed, local propane rates, delivery, and whether the cylinder needs inspection or service.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Refill at a propane dealer | $85 | $120 | $160 | About 18-24 gallons at $3.50-$6.75 per gallon |
| Delivered refill | $110 | $150 | $220 | Includes a typical delivery or service charge |
| Exchange, where available | $100 | $145 | $200 | Availability and cylinder terms vary |
What a 45 kg propane refill usually costs
In the U.S., a 45 kg bottle is generally priced like a 100 lb propane cylinder. A standard refill often totals $85-$160 at a filling location; a near-empty cylinder filled close to its safe capacity may cost more than a partial refill. The average price is about $120, assuming ordinary retail propane rates and no delivery fee.
Budget roughly $3.50-$6.75 per gallon, or about $85-$160 for a full refill. A 100 lb cylinder holds approximately 23.6 gallons when filled to the standard 80% liquid-volume limit, but the amount added depends on how much propane remains. Assumptions: U.S. 100 lb cylinder, standard propane, dealer filling, no unusual access or repair.
How propane, labor, and delivery appear on the quote
Many dealers charge by the gallon, while others quote a flat fill price. Ask whether the stated price includes taxes, cylinder handling, and any minimum service charge. Delivery charges can materially raise the total, especially for a single bottle or a remote address.
| Quote component | Typical range | What it covers | Cost effect |
|---|---|---|---|
| Propane | $3.50-$6.75 per gallon | Fuel dispensed, often 18-24 gallons | $63-$162 depending on amount |
| Fill or handling fee | $0-$20 per cylinder | Service, weighing, or minimum transaction | May be separate from fuel |
| Delivery | $25-$75 per stop | Trip to the property | Can be lower per bottle with multiple cylinders |
| Inspection or valve work | $15-$60 | Inspection or minor service, if needed | Repairs may cost more |
Compare the delivered total, not just the posted per-gallon rate. For labor-based service, a simple estimate is ; a $75-$125 hourly service rate may apply when troubleshooting or repairs are involved, rather than routine filling.
Why cylinder weight and remaining fuel change the bill
A bottle that is half full may need only about 12 gallons, while a nearly empty one could take close to 23.6 gallons. The dealer may weigh the cylinder or use a fixed-price fill, so confirm how the quantity is determined. A cylinder’s tare weight, stamped on its collar, is its empty weight and helps distinguish remaining fuel from total weight.
Capacity is not the same as the amount charged: refills are limited to about 80% liquid capacity. A damaged, out-of-date, or incompatible cylinder can be rejected or require service before filling. In many U.S. areas, portable-cylinder requalification commonly follows a 12-year initial period and subsequent inspection intervals, but the stamp and applicable rules determine eligibility.
How local propane rates shift the 100 lb refill price
Retail propane prices vary with regional supply, season, distance from a supplier, and whether the sale is a small-cylinder fill or a larger residential delivery. As a planning estimate, rural or remote service can run 10%-25% above nearby metro pricing, while high-demand cold-weather markets may be 10%-30% higher than off-season rates. These are budget ranges, not guaranteed regional tariffs.
Small-cylinder retail fills often cost more per gallon than bulk residential propane. Compare at least two local dealers and ask for the current per-gallon charge, minimum fill, and service fees. A low posted fuel rate may not be the least expensive option if it requires a separate trip or has a large minimum charge.
When delivery takes more labor than a dealer fill
Taking the cylinder to a refill station generally avoids a delivery charge, though transport must follow the dealer’s safety requirements and local rules. Home delivery is useful when the bottle is too heavy to move safely or the site has multiple cylinders, but the supplier may charge a minimum order or route fee. Stairs, long carries, and restricted vehicle access can add handling costs.
Delivery fees are easiest to control when several cylinders can be serviced on one visit. Ask whether the quote includes connection checks or only fuel delivery. Routine filling is usually quick at a staffed location; a delivery appointment may take longer to schedule during winter demand or after severe weather.
Three realistic quotes for a 45 kg bottle refill
These examples show how fill volume and service type change the bill. Assumed propane prices are illustrative local retail rates, and taxes or unusual repair work may add to the total.
| Scenario | Fuel calculation | Added fees | Estimated total |
|---|---|---|---|
| Partial refill at dealer | 12 gallons × $3.75 = $45 | $5 handling | $50 |
| Near-empty bottle at dealer | 23 gallons × $4.50 = $103.50 | $10 handling | $114 |
| Near-empty home delivery | 23 gallons × $5.00 = $115 | $45 delivery | $160 |
For a fair comparison, use the same estimated gallons and include every fee in each quote. A flat-price quote should state whether it assumes an empty cylinder and a standard fill limit.
Refill versus exchange for a 100 lb cylinder
Refilling is usually preferable when the cylinder is in good condition and the dealer charges by the gallon. Exchange can be convenient, but 100 lb exchange service is less widely available than small grill-cylinder exchange, and the price may include a cylinder rental, deposit, or different fuel quantity. Check whether the replacement cylinder’s certification and condition meet the intended use.
Compare the fuel quantity and cylinder terms before treating an exchange price as equivalent to a refill. If a cylinder is damaged or cannot pass inspection, replacement may be necessary; a new 100 lb cylinder commonly costs about $180-$350 before propane, depending on brand, valve, and retailer.
Ways to lower the refill bill without cutting safety
Call before driving to confirm the dealer fills 100 lb cylinders, its current gallon rate, and whether the cylinder will be accepted. If delivery is optional, compare the total cost of transport against the service fee, and combine multiple bottles into one delivery when practical. Scheduling outside peak winter demand may also avoid urgent-service charges.
Keep the cylinder in refillable condition and avoid paying for unneeded delivery or rush service. Do not attempt to overfill, transfer propane yourself, or bypass an inspection requirement. If a valve leaks, the cylinder is corroded, or the date marking raises a question, ask a qualified propane provider to assess it before arranging a refill.