Calculator

Propane tank refill cost calculator

Pick a tank size, fill level, and state. We convert cylinder weight to gallons at 4.24 lb/gal and multiply by the EIA residential propane price for that state (or the U.S. average). You can override the $/gal field.

Tank size Fill level (80%)

ASME tanks are typically filled to about 80% of water capacity. Cylinder “20 lb” labels already reflect a safe fill of that cylinder — set to 100% if you’re estimating a full labeled charge.

State (for EIA residential price) Price per gallon ($)

Estimated gallons

—

Estimated cost

—

Disclaimer: EIA residential prices are for delivered home heating propane and usually run lower than what a retail cylinder refill or exchange charges at a store or fill station. Treat this as a baseline estimate — call a local station for today’s refill price. Taxes and shop fees are not included.

Find stations on the map → EIA price trends

Source: U.S. Energy Information Administration (EIA) — Weekly Residential Propane Prices (dollars per gallon, excluding taxes). Week of 2026-10-26. EIA release date: 10/28/2026. EIA table.