The propane tank size chart shows capacity, BTU output, dimensions, and common uses for every standard propane cylinder and storage tank. Propane tanks are sized by weight capacity (pounds) for portable cylinders or volume (gallons) for large stationary tanks.
Propane Tank Size Chart
| Size | Lbs | Gallons | Total BTU | Dimensions | Common Uses |
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Common Appliance BTU Reference
| Appliance | BTU/hr | 20 lb tank lasts | 100 lb tank lasts |
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How to Choose the Right Propane Tank Size
Choosing the right size from the propane tank size chart depends on how much propane you use and how often you want to refill. Larger tanks cost more upfront but require fewer refills and often have lower per-gallon pricing.
Portable Cylinders (1-100 lbs)
Portable cylinders range from 1 lb camping canisters to 100 lb cylinders used for heating. The ubiquitous 20 lb tank (standard BBQ grill size) is the most common. These tanks can be exchanged at most hardware and grocery stores, or refilled at propane dealers for a lower per-gallon cost.
Residential Tanks (120-1,000+ gallons)
Large stationary tanks are installed by propane suppliers and typically rented. Sizing depends on annual consumption: a home using propane for heating, water heating, and cooking in a cold climate might use 1,000+ gallons per year, requiring a 500-1,000 gallon tank for reasonable fill intervals.
Safety Guidelines
Propane tanks are filled to 80% capacity (not 100%) to allow for expansion. Tanks must be stored upright and outdoors. Never store propane cylinders inside a vehicle or enclosed space. Check expiration dates on portable cylinders — requalification is required every 10-12 years.
Frequently Asked Questions
Is this propane tank size chart free?
Yes, completely free with no signup required.
How many gallons are in a standard 20 lb propane tank?
A 20 lb (standard grill) propane tank holds approximately 4.7 gallons of liquid propane when full. It delivers about 430,000 BTU total. For a standard gas grill burning 35,000 BTU/hour, that's roughly 12 hours of grilling time.
How long does a 100 lb propane tank last?
A 100 lb propane tank holds about 23.6 gallons and delivers approximately 2.16 million BTU. For a 60,000 BTU/hour home furnace, that's about 36 hours of continuous run time. In practice, seasonal use stretches it much longer — a 100 lb tank can last months for a weekend cabin.
What size propane tank do I need for a whole house?
For whole-house heating and appliances, a 500 or 1,000 gallon tank is typical. A 500-gallon tank (holds 400 gallons at 80% capacity) suits most homes. Larger homes in cold climates often need 1,000 gallon tanks to avoid frequent refills in winter.
What does propane tank capacity mean — pounds vs gallons?
Tanks are rated in pounds (weight of propane they hold) for portable cylinders, or gallons for large stationary tanks. One gallon of liquid propane weighs approximately 4.24 lbs and contains about 91,500 BTU. To convert: pounds ÷ 4.24 = gallons.
Should I own or rent a propane tank?
Small cylinders (1-100 lb) are typically purchased outright. Large stationary tanks (250+ gallons) are often rented from propane suppliers who then have exclusive delivery rights for that tank. Owning your tank gives you flexibility to shop multiple suppliers, but requires a larger upfront investment.