30lb Propane Tank Refill Cost: 2026 Pricing for RV and Heater Tanks
How Much Does It Cost to Refill a 30lb Propane Tank?
A 30lb propane tank costs about $22-30 to refill in 2026, roughly $3.10-$4.25 per gallon for the ~7.1 gallons it holds. U-Haul typically runs $21-28 and Tractor Supply $24-30; Costco is cheapest at $20-24 where available, but not every warehouse fills 30lb tanks. Blue Rhino and AmeriGas exchange cages do not carry 30lb tanks, so refilling your own is the only retail option at this size.
A full 30lb fill is about 7.1 gallons (the 30 lb rating already reflects the 80% volumetric safety limit). Retailer rates are estimates compiled from location reports; confirm with your local store before travel.
30lb Tank Specifications
| Propane when properly filled | 30 lb / ~7.1 gallons |
| Cylinder liquid capacity | ~8.9 gallons (OPD valve stops at 80% = the 30 lb fill) |
| Typical refill cost | $22-30 (2026) |
| Use cases | RV portable tanks, large patio heaters, turkey fryers |
| Retailers that accept 30lb | Tractor Supply, U-Haul, Flying J, Costco (varies) |
| Exchange availability | Not available - exchange only carries 20lb tanks |
30lb Refill Costs by Retailer
| Retailer | 30lb Cost | Notes |
|---|---|---|
| Costco | $20-24 | Some locations only. Call ahead. Cheapest if available. |
| U-Haul | $21-28 | 1,400+ locations. By weight or gallon. |
| Tractor Supply | $24-30 | 2,200+ stores, most accept 30lb. By the gallon. |
| Flying J / Pilot | $22-30 | Truck stops - good for RV road trips. |
| Blue Rhino / AmeriGas | N/A | Exchange networks do not carry 30lb tanks. |
Note: Blue Rhino and AmeriGas exchange cages only carry standard 20lb tanks. If you need a 30lb refill, refill stations (Tractor Supply, U-Haul, Flying J) are your only retail option. For 40lb or larger, options narrow further.