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Last verified 11 June 2026

Propane Refill Cost Calculator 2026: Retailer Estimates

Select your tank size, retailer, and region for a real 2026 cost estimate. No exchange conversion charts - this maps directly to refill station pricing.

Wholesale benchmark$0.80/gal-5¢ wk· Mont Belvieu spot (06-08)
BBQ grill, portable heater • 4.7 gal usable
+23% vs national average ($2.67/gal)
U-Haul - 20 lb Tank - South
$20.25
estimated total cost
$/gallon
$4.31
$/lb propane
$1.02
Gal received
4.70
U-Haulpricing guide →
Top 3 cheapest for 20 lb in South
$16.78
$20.25

How These Estimates Are Calculated

Tank capacity figures use the standard propane weight-to-volume conversion of 4.24 lb per gallon. A cylinder's lb rating is the amount of propane it holds when properly filled (the rating already reflects the 80% volumetric safety limit enforced by the OPD valve): 20lb = ~4.7 gal; 30lb = ~7.1 gal; 40lb = ~9.4 gal; 100lb = ~23.6 gal.

Per-gallon prices reflect typical posted store prices for each retailer; most refill retailers price by location and do not publish a national rate, so treat them as estimates. Regional multipliers are derived from live EIA SHOPP residential propane data (US national average $2.67/gal as of week ending 30 March 2026). Current regional averages: Northeast $3.69/gal (+38% vs national), Midwest $2.07 (-22%), South $3.29 (+23%), West $2.39 (-10%). Refreshed 11 June 2026.

Exchange network prices (Blue Rhino, AmeriGas) reflect the flat per-tank fee for a 15lb short-fill. The effective per-gallon equivalent is calculated at 3.5 gallons (15lb at 4.24 lb/gal). Confirm all prices with your local retailer before travel.

Calculator FAQ

How accurate is this propane refill calculator?⌄
The calculator uses each retailer's published per-gallon pricing for the refill tier, adjusted by a live regional multiplier derived from EIA SHOPP weekly residential propane data (week ending 30 March 2026, US national average $2.67/gal). Actual prices at your location may vary by 5-15%. Always confirm with your local retailer before driving.
Why does the calculator show different costs for the same tank size?⌄
Propane per-gallon prices vary significantly by retailer (the refill tier alone spans roughly $2.90/gal at Costco to $4.15/gal at Ace). Exchange networks charge a flat per-tank fee but only fill to 15 lb (a 3.5-gallon short fill), making them the most expensive per pound on big tanks. Regional pricing also varies: at the latest EIA release, the priciest region (Northeast) sits +38% versus the national average, while the cheapest region (Midwest) sits -22%.
Does the region selection affect the result?⌄
Yes. The calculator applies a live regional multiplier derived from EIA SHOPP residential propane data. At the latest release (week ending 30 March 2026), Northeast runs at $3.69/gal (+38% vs the $2.67 national average) and Midwest runs at $2.07/gal (-22%). Pick your region to apply the appropriate multiplier; expect quotes in your area to land within roughly 10-15% of the calculator's estimate.
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