How Much Gas Does a BBQ Use During Summer?
- Kelsey W
- Jul 6
- 4 min read
A sunny weekend, friends in the garden, burgers on the grill—and suddenly someone asks:
"Do we have enough gas left?"
It's a question most BBQ owners don't think about until the flame starts weakening halfway through cooking.
The good news? Gas BBQs are usually more efficient than people expect. In this guide, we'll explain exactly how much gas a summer BBQ uses, how long a propane bottle should last, and simple ways to make your gas go further this summer.
Understanding BBQ Gas Consumption
Most gas barbecues in the UK run on propane, which is stored in refillable gas cylinders. The amount of gas your BBQ uses is typically measured in kilowatts (kW) per hour, which indicates how much energy the burners consume when running at full power.
A typical gas BBQ can range from:
6kW to 10kW for smaller two or three-burner models
10kW to 15kW+ for larger family-sized barbecues
15kW to 20kW+ for premium outdoor kitchens and professional-style models
As a rough guide:
1kg of propane provides approximately 13.8kWh of energy.
This means a 10kW barbecue running at full power for one hour could use around:
10 ÷ 13.8 = approximately 0.72kg of propane per hour
However, most people don't cook with every burner on maximum heat for the entire session, so actual consumption is often lower.
How Many BBQs Can You Get From One Gas Bottle?
This is one of the questions we hear most often.
Here's a simple estimate based on average usage:
Gas Bottle Size | Approximate BBQ Sessions |
5kg Patio Gas | 5–10 BBQs |
13kg Patio Gas | 13–25 BBQs |
If you're only grilling for the family once a week, a larger bottle could easily last a full summer season.
For keen outdoor cooks who BBQ several times a week, keeping a spare cylinder on hand can save any unpleasant surprises halfway through cooking.
What Affects Gas Usage?
Not all BBQ sessions use the same amount of gas. Several factors can increase or reduce consumption.
1. The Number of Burners You Use
Many people automatically switch on every burner, even when cooking for only a few people.
If you're grilling burgers for a family of four, you may only need part of the cooking surface.
Using fewer burners can significantly reduce gas consumption while still delivering great results.
2. Cooking Temperature
High heat uses more gas.
While intense heat is perfect for searing steaks, not every food requires maximum power.
Many items cook beautifully on medium heat and use less fuel in the process.
3. BBQ Size
Larger barbecues naturally consume more gas because they have more burners and a larger cooking area to heat.
If you regularly cook for only a small group, you may never need the extra capacity.
4. Wind and Weather
We've all experienced the unpredictable British summer.
Windy days can cause heat loss, meaning burners work harder to maintain temperature.
Positioning your BBQ in a sheltered, well-ventilated area can improve efficiency and help your gas last longer.
5. Lid Usage
Cooking with the lid down traps heat inside the BBQ.
This not only cooks food more evenly but often reduces cooking times and gas usage as well.
Simple Ways to Make Your BBQ Gas Last Longer
Nobody wants to realise they've run out of gas halfway through cooking a batch of burgers.
Here are some practical ways to stretch every cylinder further.
Preheat Smarter
Many people leave the BBQ preheating for 20–30 minutes when 10–15 minutes is often enough.
Avoid over-preheating and you'll save fuel every time you cook.
Keep the Lid Closed
Every time the lid is opened, valuable heat escapes.
Try to resist the temptation to constantly check on food.
Your gas bottle will thank you.
Clean Your Burners
Grease build-up can affect burner performance and heat distribution.
A clean barbecue works more efficiently and may use less gas to achieve the same cooking temperatures.
Cook More at Once
If the BBQ is already hot, make the most of it.
Cook extra food for lunches, meal prep or leftovers rather than lighting the barbecue again the next day.
Check for Gas Leaks
Small leaks can waste fuel without you even noticing.
Regular maintenance and safety checks help ensure you're getting the most from every bottle.
Is a Gas BBQ Cheaper Than Charcoal?
This is a debate that has probably been happening since gas barbecues first arrived.
While charcoal enthusiasts love the traditional flavour, gas BBQs offer several cost advantages:
Instant ignition
Better temperature control
Less fuel waste
Faster cooking times
Reusable fuel cylinders
For households that barbecue regularly throughout summer, gas can often be the more convenient and economical option over time.
Planning Ahead for BBQ Season
One of the easiest ways to avoid running out of fuel during a family gathering is to check your gas supply before guests arrive.
Many modern cylinders have gauges available, but even a simple lift test can give you a good indication of how much gas remains.
If you're planning garden parties, birthdays, sporting events or bank holiday gatherings, arranging a replacement cylinder before you need it can provide extra peace of mind.
After all, nobody wants to explain to hungry guests why dinner is delayed because the gas ran out midway through cooking.
Final Thoughts
The average gas BBQ uses far less fuel than most people expect. For many households, a single propane cylinder can comfortably power multiple BBQs throughout the summer season.
By understanding your barbecue's gas consumption and following a few simple efficiency tips, you'll keep cooking costs under control while enjoying all the benefits of outdoor dining.
So whether you're grilling burgers on a sunny afternoon or hosting a garden gathering that lasts well into the evening, you can fire up the BBQ knowing exactly where your gas is going — and how to make it last a little longer.
Need a propane gas refill for BBQ season? Economy Gas Services supplies reliable gas cylinders to help keep your summer cooking uninterrupted, so you can spend less time worrying about fuel and more time enjoying the barbecue. 🌭🔥☀️
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