Which Propane Tank Works With a Portable Grill?
Small 1 lb cylinders or a refillable 20 lb tank? Here is how the sizes compare, how long they last, how adapters work, and how to store and transport them safely.
The basics
Two common choices
| Consideration | 1 lb cylinder | 20 lb tank |
|---|---|---|
| Weight, full | About 2 lb | About 37–39 lb |
| Fuel capacity | About 20,000 BTU of propane | About 430,000 BTU |
| Typical use | Short trips, light camping, backups | Longer trips, frequent grilling, backyard |
| Connection | Direct attachment, or an adapter hose | Adapter hose and regulator are common |
| Cost over time | Higher per hour of cooking | Lower per hour |
| Refillable | Usually disposable | Yes |
These are general industry values; capacities and numbers vary a little between brands.
Runtime
How long does a propane tank last?
| Grill output | Approx. propane use per hour | Est. time on a 20 lb tank |
|---|---|---|
| 10,000 BTU/hr | 0.5 lb | ~30 hours |
| 20,000 BTU/hr | 0.9 lb | ~16 hours |
| 30,000 BTU/hr | 1.4 lb | ~10 hours |
Runtime comes down to one relationship: how many BTU an hour your grill burns against how much propane the tank holds. Higher output drains a tank faster. A 1 lb cylinder at full heat lasts roughly an hour, and closer to an hour and a half or two when you cook at mixed or lower heat.
Estimates vary with temperature, wind, and how high you run the burner. FoldSear's own output is still being confirmed with the factory, so we'll add a FoldSear-specific estimate here once that number is set.
Adapters and hoses: what to know
Some portable grills attach a 1 lb cylinder directly. To run from a 20 lb tank, you usually need an adapter hose and a regulator.
- The regulator controls pressure. The size of the tank does not change the pressure on its own.
- Every fitting must be rated for propane.
- Confirm the connection type matches before you buy.
Do not modify connectors yourself, and never mix parts that are not designed to fit together. FoldSear's cylinder connection, and whether it ships with a regulator and hose, are still being confirmed with the factory.
Which should you choose?
- Choose a 1 lb cylinder if you travel light, cook shorter meals, and want a compact setup.
- Choose a 20 lb tank (with the right adapter, if your grill supports it) if you cook often, stay out for several days, or want a lower cost per hour.
- Bring a spare either way, so you don't run out in the middle of a cook.
Propane safety: storage, transport, leaks
- Store outdoors only. Don't keep cylinders inside a home, garage, basement, shed, or tent.
- Keep away from heat. Don't store a cylinder near a heat source or in a hot place; heat raises pressure.
- Don't store a spare under or near the grill.
- Transport upright and secured. Stop it from shifting or rolling, and use a stabilizer such as a crate.
- Ventilate your vehicle. Don't leave a filled cylinder in a hot car or a closed trunk; take it out on arrival.
- Check for leaks. Do a bubble test each time you connect a cylinder and at the start of each season. Never use a flame to check.
- If you smell gas, put out flames, leave the area, shut off the gas if it's safe to do so, and call your propane supplier or 911.
- Use only approved cylinders in good condition, and follow your grill's manual.
These are general safety practices. Always follow the instructions for your specific grill and cylinder.
FoldSear's gas requirements
Charcoal mode: no gas needed. When you cook in charcoal mode, FoldSear uses no propane at all.
The propane details — fuel type, cylinder connection, included regulator and hose, maximum output, and the recommended cylinder — are still being confirmed with the factory, so we're not publishing numbers here yet. Join the waitlist and we'll include them once they're verified.
FAQ
Propane tank questions
Can I use a 20 lb tank on a portable grill?
Many portable grills can, with an adapter hose and regulator — but only if the grill is built to support it. Check your manual before connecting a larger tank.
How long does a 1 lb propane cylinder last?
About one to two hours, depending on how high you run the burner and the grill's output. Full heat lands nearer the short end.
How long does a 20 lb tank last?
Roughly 10 to 30 hours, depending on the grill's BTU rating and how high you cook. A lower-output grill runs many more hours on the same tank.
Do I need a regulator?
Yes. Never run propane from a cylinder without a regulator. Some grills include one; others need it as part of the adapter hose.
Can I carry a propane cylinder in my trunk?
Transport it upright, secured, and ventilated, and don't leave it in a hot car. Some places limit how many cylinders you can carry in an enclosed vehicle, so check local rules too.
How do I check for gas leaks?
Brush soapy water on the connections and watch for bubbles with the gas on. Never use a flame to test for leaks.
What propane tank does FoldSear use?
The cylinder connection and recommended tank for FoldSear are still being confirmed with the factory. Join the waitlist to get the answer once it's verified.
Is it safe to store a spare tank near the grill?
No. Keep spare cylinders outdoors in a shaded, ventilated place, away from the grill and any heat source.
FoldSear runs on gas or charcoal — see how the two modes compare.
Last updated: October 24, 2026