Refilling a propane tank in 2026 usually costs somewhere between about 3–4 dollars per gallon, or 15–25 dollars to fill a typical 20 lb BBQ tank , but it varies a lot by location, season, and whether you refill or exchange your tank.

Quick Scoop

Typical 2026 refill price range

  • Many stations in the U.S. are around 3–4 dollars per gallon for bulk propane , depending on region and market conditions.
  • A standard 20 lb BBQ tank (about 4–5 gallons when filled to 80%) often ends up at roughly 15–20 dollars to refill at local suppliers , when you pay by the gallon.
  • Tank exchange at convenience stores / big-box retailers is usually more expensive on a per‑gallon basis, commonly about 20–25 dollars for a 20 lb tank , and those exchange tanks are often not completely full.

In practice, that means you might pay ~16–18 dollars to refill the same tank that would cost ~22–25 dollars to exchange, depending on where you live and the day’s price.

Example price points

  • One U.S. retailer lists bulk propane at about 3.79 dollars per gallon , with a 20 lb exchange tank at about 26.99 dollars.
  • A national estimate puts propane around 2.50 dollars per gallon , refill at 3.99 dollars per gallon , and 20–25 dollars for a 20 lb exchange tank.
  • A guide to tank sizes notes that a 20 lb tank averages 15–20 dollars to fill , while a 500‑gallon home tank can be around 1,000 dollars to fill when close to empty.

What actually affects the price?

Several factors change how much you’ll pay:

  • Where you live: State, city, and even local competition between propane dealers can push prices up or down.
  • Tank size and how empty it is: Propane is sold per gallon , so bigger tanks and lower starting fuel levels mean a higher total bill.
  • Season and demand:
    • Winter heating demand usually raises prices.
    • Summer grill season can keep demand steady but often with more stable pricing.
  • Market conditions: Crude oil and natural gas prices, storage levels, transportation costs, and even weather events all affect propane pricing.
  • Refill vs exchange:
    • Refilling typically costs less overall , and you pay only for the fuel you actually get.
    • Exchange tanks are convenient but often less than completely full , so the effective per‑gallon price is higher.

Quick way to estimate your own cost

You can estimate your cost with a simple approach:

  1. Find your local price per gallon (from a nearby hardware store, farm supply store, or propane dealer website; many advertise a per‑gallon refill price).
  1. Estimate gallons in your tank :
    • A 20 lb tank holds about 4–5 gallons when filled to 80% ; larger residential tanks have published gallon capacities (for example, 500‑gallon tank ≈ 400 usable gallons at 80%).
  1. Multiply:
    • If local price is 3.50 dollars per gallon and you add 4 gallons, that’s about 14 dollars to refill a 20 lb tank.

Some online calculators also let you plug in tank size and price per gallon to estimate the refill cost for larger tanks like 100, 250, or 500 gallons.

Mini “real‑life” scenario

Imagine you’re heading into the weekend and your grill tank is nearly empty:

  • Your nearby farm store advertises 3.99 dollars per gallon for refills.
  • Your 20 lb tank takes about 4 gallons to go from nearly empty back to 80% full.
  • Your bill ends up around 16 dollars.

Across town, the convenience store offers a tank exchange for about 22 dollars , but that exchanged cylinder may have a bit less propane than a full refill would provide.

So refilling usually saves you a few dollars each time, and over a grilling season (or a full heating season for larger tanks), that difference can add up. Bottom line: For most people asking “how much to refill propane tank,” expect roughly 15–20 dollars to refill a standard 20 lb tank , with larger home tanks scaling up based on the local per‑gallon price, season, and how empty your tank is.

Information gathered from public forums or data available on the internet and portrayed here.