100 Gallons of Propane Cost

Right at the partial-fill floor. National average $267 at $2.674/gal (EIA, week ending 30 March 2026). What 100 gallons gets you, the per-state range, and the partial-fill premium that usually applies at this size.

Latest EIA residential propane price

Source: EIA SHOPP residential propane survey. Current data is the final release of the 2025/26 heating season (week ending 30 March 2026). EIA pauses weekly publication April-September; next release expected October 2026. Refreshed 13 May 2026.

100 Gallons: What It Costs Today

National average

$267.40

100 × $2.674 (EIA April 2026)

Cheapest state (Texas)

$218

$2.184/gal × 100 gal

Most expensive (Hawaii)

$415

$4.15/gal × 100 gal (PADD-5 fallback)

Typical partial-fill fee

$25 - $75

Added on orders under 200 gal

All-in delivered (low state)

$243 - $293

Texas + typical fee

All-in delivered (high state)

$440 - $490

Hawaii + typical fee

100 Gallons of Propane Cost by State (Sample, April 2026)

EIA per-gallon residential price × 100. Excludes partial-fill / delivery fees that may add $25-$75.

State	Price/gal	100-gal cost	vs national avg
Texas	$2.184	$218	-18%
Louisiana	$2.22	$222	-17%
Florida	$2.55	$255	-5%
Virginia	$2.78	$278	+4%
Pennsylvania	$3.22	$322	+20%
Vermont	$3.95	$395	+48%
Hawaii	$4.15	$415	+55%

See full pricing for all 50 states. Source: EIA Heating Oil & Propane Survey.

What 100 Gallons of Propane Actually Buys You

100 gallons of propane carries roughly 9.15 million BTU (each gallon = 91,500 BTU). What that powers depends entirely on the appliance and your climate:

Whole-home heating, 1,500 sqft, moderate climate: 4-6 weeks of winter heating
Whole-home heating, 1,500 sqft, cold climate (NE / upper Midwest): 2-3 weeks
Water heating + cooking only: 3-4 months of household use
Propane fireplace + stove only: 8-12 months
Backup generator at half load (5 kW): 60-70 hours of runtime
20-lb BBQ cylinder refills: ~21 refills (each cylinder holds ~4.7 gal)
50,000 BTU pool heater: ~180 hours of operation

For more typical use cases, see the propane usage calculator.

The Partial-Fill Premium at 100 Gallons

100 gallons sits right at the residential delivery floor. Most suppliers structure pricing in three tiers:

Below 200 gallons (where you are): Full retail rate, plus a $25-$75 partial-fill / trip fee. Truck-delivery cost is fixed regardless of volume; suppliers recover it via the fee.

200-500 gallons: Typical 5-10% per-gallon discount, partial-fill fee usually waived. Sweet spot for most residential customers.

500+ gallons: Best volume discount, typically 10-15% off retail. Best per-gallon economics.

Practical takeaway: if your tank can hold more, doubling your order from 100 to 200 gallons typically pays back the larger upfront cost within a single delivery cycle by waiving the trip fee. See the refill-cost guide for the math at common tank sizes.

Cost at Other Quantities

100 gal of propane

$267

You are here

500 gal of propane

$1,337

1,000 gal of propane

$2,674

100 Gallons of Propane: FAQ

How much does 100 gallons of propane cost in 2026?

At the April 2026 EIA national residential average of $2.674 per gallon, 100 gallons of propane costs about $267. State-level variation is wide: in Texas the same 100 gallons runs about $218, while in Hawaii it's about $415. Most suppliers also add a delivery or partial-fill fee of $25-$75 on orders below the 200- to 250-gallon volume threshold, so the all-in cost for a 100-gallon delivery is typically $300-$345 in lower-priced states and up to $490 in the highest.

Can you actually order just 100 gallons of propane?

Most residential propane suppliers have a 100-gallon minimum for scheduled delivery, so 100 gallons is exactly at the floor. A few suppliers will deliver as little as 50 or 75 gallons but charge a partial-fill fee of $25-$75 because the delivery truck cost is the same whether they pump 100 or 500 gallons. If your tank can hold more, ordering 200-300 gallons usually unlocks better per-gallon pricing AND avoids the partial-fill fee.

What can you do with 100 gallons of propane?

100 gallons of propane delivers roughly 9.15 million BTU. In practical terms that's about 4-6 weeks of whole-home heating in a 1,500 sqft moderately insulated home in winter, or 3-4 months of water heating + cooking only, or 8-12 months running a propane fireplace plus stove top. A standard 20-pound BBQ cylinder holds about 4.7 gallons, so 100 gallons is roughly 21 BBQ-tank refills. A propane generator running at half load uses about 1.5 gallons per hour, so 100 gallons sustains 60-70 hours of backup power.

Why is 100 gallons more expensive per gallon than 500 gallons?

Suppliers charge volume tiers. Below ~200 gallons per delivery you typically pay the full retail rate plus a partial-fill or trip fee. At 250-500 gallons you usually get a 5-10% volume discount and the partial-fill fee is waived. Above 500 gallons the discount typically grows to 10-15% off the retail rate. The truck-delivery cost is largely fixed, so suppliers spread that cost differently across small vs large orders. If you have a 500-gallon tank and you're ordering 100-gallon partial fills repeatedly, you're paying an extra 10-15% per gallon vs filling once.

What size tank do I need to take a 100-gallon delivery?

Any tank with at least 125 gallons of empty space at delivery time. The 80% fill rule (NFPA 58 safety standard) means a 250-gallon tank holds 200 usable gallons; if it's at 50% (100 gal in tank, 100 empty), you can take a 100-gallon delivery. A 500-gallon tank holds 400 usable gallons. A 100-pound cylinder holds 23 gallons usable, so it can't take a full 100-gallon delivery. Most US homes with propane heating run 250- or 500-gallon tanks; 100-gallon deliveries are typically partial fills in those.

About the author

Oliver Wakefield-Smith

Founder of Digital Signet, an independent research firm that builds data-led pricing and decision tools using public datasets. PropaneCostPerGallon.com is sourced from the EIA Weekly Heating Fuels Survey, with assumptions and refresh cadence documented on the methodology page.

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