Ameer Randolph
When planning a backpacking trip, it is important to consider how much fuel you will need to bring. The amount of fuel required depends on several factors, including the number of people in your group, the number of hot meals and drinks required, the type of food being prepared, and the environmental conditions you expect to encounter. Wind, elevation, and air temperature can all impact the amount of fuel needed, so it is important to plan accordingly and bring extra fuel if necessary. To estimate your fuel usage, you can calculate the amount of boiling water required per person per meal and use your stove's boil and burn time specifications to determine your fuel needs. It is better to bring extra fuel than to run out, but carrying unnecessary weight can slow you down, so finding the right balance is crucial.
| Characteristics | Values |
|---|---|
| Fuel required | Enough to boil one liter of water per person, per meal |
| Fuel calculation factors | Stove's boil time, total burn time, number of people, number of hot meals and drinks, wind, elevation, air temperature, and other conditions |
| Fuel-saving tips | Use a windscreen with the stove, simmer food instead of boiling, use a mix of boiling and ambient temperature water, run the stove at about 1/4 power, rehydrate meals with hot water instead of boiling |
| Fuel canister options | IsoPro Fuel Canister (8 oz/227 g), All-Purpose Propane Gas Cylinder (16.4 oz/465 g), Butane Fuel Cylinder (8.8 oz), MSR IsoPro Fuel Canister (4 oz/110 g), Jet Boil Fuel Canister (4 oz/100 g), MSR Pro Canisters (110 g/80 g/20 fuel), MSR SuperFly Stove Canister |
| Fuel weight considerations | Pack weight below 9 lbs, 2 x 4 oz cans are better than 1 x 8 oz can to avoid the risk of a faulty valve |
| Fuel economy considerations | Freeze-dried meals are excellent for fuel economy, but may not be available globally |
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What You'll Learn
How much water you need to boil
When backpacking, the amount of fuel you need depends on how much water you will boil and how long you will cook your food. As a general rule, you should bring enough fuel to boil one litre of water per person per meal. This rule assumes that you will be using boiling water for freeze-dried meals, coffee, tea, instant oatmeal, and rehydrating meals.
However, you may not need to bring water to a boil for rehydrating meals. Hot water works just fine, and it saves a lot of fuel. If you are cooking meals that require simmering, such as pasta, you will need to bring more fuel. Additionally, if you are melting snow to drink or boiling water to purify it, you will also need to bring more fuel.
Environmental factors such as wind, elevation, and air temperature can also affect your fuel consumption. For example, in windy conditions, the wind can blow away much of the heat generated by your stove, so you may need twice as much fuel as you would in perfect conditions. Similarly, if the ambient temperature is low, it will take longer to bring water to a boil.
To calculate how much fuel you need for boiling water while backpacking, follow these steps:
- Make a meal plan: Figure out how much water you will need to boil and how long your food will need to cook.
- Assess your fuel needs: Use your stove's specifications for boil time and burn time to calculate your fuel requirements.
- Adjust for factors that will impact your fuel usage: Consider environmental factors such as wind and elevation, as well as the types of meals you will be preparing.
By following these steps, you can estimate how much fuel you will need to bring for boiling water while backpacking. Remember to factor in your stove's performance and fuel usage based on your previous trips to make a more informed decision.
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How long your stove takes to boil water
The time it takes for your stove to boil water depends on a variety of factors, including the efficiency of your stove, the altitude, and the wind conditions.
Stove efficiency is influenced by the stove's design and the user's technique. Some stoves are designed to regulate fuel pressure, counteracting any drop in ambient air pressure at higher altitudes. Most liquid fuel stoves can be manually pressurized by pumping, offsetting any impacts on efficiency caused by elevation changes. Using a medium-high setting, or about 75% of the maximum, is generally the most efficient. A windscreen can also improve efficiency by protecting the stove from wind, which can severely impact performance.
At higher altitudes, water boils at a lower temperature, and the cooking time for raw foods will be longer. According to stove manufacturer MSR, for every 18 degrees Fahrenheit drop in the boiling point, cooking time will double. Backpacking meals that require boiling water to rehydrate will need to sit longer in hot water at higher altitudes. At extreme altitudes above 18,000 feet, a typical backpacking cook-set will not reach a high enough temperature to cook a hot meal.
The amount of fuel you need to boil water will depend on your stove's efficiency and the volume of water you need to boil. As a general guide, you should bring enough fuel to boil one liter of water per person per meal and factor in your stove's boil time and total burn time. For example, if your stove's boil time is 3 minutes and 30 seconds for one liter of water, and you need to boil 2.5 liters of water, it will take 8 minutes and 45 seconds in total.
To calculate your fuel needs, you can test your stove at home by boiling the amount of water you anticipate using each day and measuring the fuel consumed. You can also refer to your stove manufacturer's specifications for boil time and fuel usage, but note that these are typically measured in ideal conditions. It is recommended to bring extra fuel if you expect windy or cold weather, as these conditions can significantly impact stove performance.
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Environmental factors, like wind and elevation
When planning a backpacking trip, it is important to consider environmental factors such as wind and elevation, which can significantly impact the amount of fuel required.
Wind speed and direction can affect stove performance and fuel economy. Windy conditions can lower the heat efficiency of a stove by up to half, resulting in increased fuel consumption. To minimize fuel waste, opt for stoves with good wind resistance features, such as wind-resistant burners or regulated stoves. Additionally, using a windscreen or finding a sheltered spot for cooking can help reduce the impact of wind.
Elevation also plays a crucial role in fuel efficiency. As atmospheric pressure decreases with increasing elevation, the boiling point of water lowers, causing water to boil faster at higher altitudes. However, this is often offset by colder temperatures and impaired stove performance, especially with upright canister stoves. At higher elevations, some foods may take longer to cook due to slower water absorption, requiring additional fuel.
Cold temperatures, which are more common at higher elevations, can impact fuel efficiency in several ways. Firstly, colder water takes longer to reach a boil, increasing fuel consumption. Secondly, in freezing temperatures, canister pressure drops, making it harder for the fuel to vaporize, which can increase fuel consumption by 20-50%.
To account for these environmental factors, it is recommended to carry extra backup fuel when travelling to high-altitude or cold-weather locations. Conducting fuel tests before the trip and familiarizing oneself with the stove's fuel efficiency can also help in determining the appropriate amount of fuel to bring.
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The number of people and meals
When planning a backpacking trip, it's important to calculate the amount of fuel you'll need based on the number of people and meals you're preparing for. Here are some tips to help you estimate the fuel requirements for your trip:
Number of People:
The number of people in your group will directly impact the amount of fuel you need. As a general rule, plan for enough fuel to boil one liter of water per person per meal. This is a good starting point, but you may need to adjust this estimate depending on other factors, such as stove efficiency, environmental conditions, and the types of meals you'll be preparing.
Types of Meals:
Consider the types of meals and drinks your group will be having. If you're primarily relying on freeze-dried meals, instant oatmeal, coffee, or tea, you'll need to factor in the amount of boiling water required for each person at each meal. Don't forget to include any hot drinks, as these will also contribute to your fuel usage.
Stove Efficiency:
Different stoves have different boil and burn times, which will impact your fuel consumption. Get to know your stove's performance by testing it beforehand and taking notes on fuel usage. This will help you make more accurate estimates for future trips. Additionally, consider using a windscreen with your stove, especially in windy conditions, to conserve fuel.
Environmental Conditions:
Factors such as wind, elevation, and temperature can significantly affect fuel usage. Windy conditions can reduce the efficiency of your stove, potentially requiring twice as much fuel as you would use in calm conditions. Lower temperatures and higher elevations will also impact boiling times and fuel efficiency. If you plan to melt snow for drinking water or boil water for purification, you'll need to budget extra fuel.
Meal Preparation:
Some meals require simmering, which can use more fuel than simply boiling water. If your meal preparation involves simmering or cooking techniques other than boiling, be sure to take this into account when planning your fuel needs.
Fuel Conservation Tips:
To make your fuel last longer, consider running your stove at a lower setting, as running it at full power continuously will deplete your fuel supply faster. Additionally, you may not always need to bring water to a full boil, especially when rehydrating meals. Steamy hot water can often suffice, reducing the amount of fuel needed.
In summary, when planning for the number of people and meals on your backpacking trip, aim for enough fuel to boil one liter of water per person per meal as a baseline. Then, adjust this estimate based on the specific factors of your trip, including stove efficiency, environmental conditions, meal types, and cooking techniques. It's always a good idea to bring a little extra fuel to avoid running out, but with careful planning, you can minimize the amount of unnecessary weight in your pack.
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The type of food you're cooking
When cooking at high altitudes, it's important to consider the lower boiling point of water. While water boils faster at high altitudes, some foods can take longer to absorb water, resulting in longer cooking times. For example, cooking green beans at 5,000 meters will leave them almost white and lacking in taste, even after an hour of cooking. In such cases, it's advisable to stick to foods that can be eaten raw or require less cooking time.
The surrounding air temperature also affects fuel usage. Colder water takes longer to bring to a boil and will use more fuel. If you're melting snow for drinking water, you'll need to factor in the extra fuel required. Additionally, windy conditions can impact the performance of your stove, potentially requiring twice as much fuel as you would need in calm conditions.
To estimate your fuel needs, consider the amount of water you'll need to boil and the cooking time required for your meals. As a quick estimate, you can plan on boiling one liter of water per person per meal. However, for a more precise calculation, consider creating a chart that takes into account the boil time and burn time specifications of your stove.
By planning your meals and considering the environmental factors that affect fuel usage, you can make a more accurate assessment of the fuel required for your backpacking trip.
Frequently asked questions
The amount of fuel you need depends on how many people are in your group, how many hot meals and drinks you will require, and the specifications of your stove. As a general guide, you should bring enough fuel to boil one litre of water per person per meal.
Wind, elevation, air temperature, and other conditions may increase the amount of fuel you need. If you plan to melt snow or boil water to purify it, you will need to bring more fuel.
If you don't run your stove at full power, you can save a lot of fuel. You can also save fuel by using boiling water for your meals and letting it cool down before eating or drinking, rather than boiling ambient-temperature water.
First, calculate how many litres of water you will need to boil. Then, use your stove specifications to determine how many ounces or grams of fuel your stove uses to boil one litre of water. Multiply the number of litres of water by this amount to get the total amount of fuel you need in ounces or grams.
