What will it cost to fill my tank?

Pick your tank, read the gauge, and see the bill at this week’s average price for your state, or type your dealer’s quote.

Propane tank

U.S. average this week: $2.73 a gallon. A 500-gallon tank from 20% to 80% takes 300 gallons, about $819.

Tank size

Gauge reads now: 20%

Price per gallon

Use a state average

Propane tanks are filled to 80% of their size to leave room for the liquid to expand. Gauges read percent of the full size.

$819

for 300 gallons at $2.73 a gallon in the U.S..

U.S. average this week: $6.23 a gallon. A 275-gallon tank from a quarter to 90% takes about 179 gallons, roughly $1,114.

Oil tanks are rarely filled to the brim; we assume 90% of the nominal size is usable. Gauges read in quarters.

$1,114

for 179 gallons at $6.23 a gallon in the U.S..

Propane tanks are never filled past 80%. The space is left for the liquid to expand as it warms. A “500-gallon” tank holds at most 400 gallons.
Small deliveries cost more. Many dealers add a fee below a minimum (often 100–150 gallons) or charge a higher per-gallon price for will-call customers than for automatic delivery.
Gauges are approximate. Propane float gauges and oil tank gauges can be off by several percent. Plan the fill around the delivered gallons on the ticket, not the gauge.
Prices here are state averages from EIA’s weekly survey. Your quote will differ; the calculator takes any price you type.