Enter your trip and your stove. You get the grams of fuel to carry and which canisters to bring — with every assumption shown, so you can change it.
You need
70 g of fuel
4.1 L of water boiled · includes a 15% margin
Carry: 100 g canister (~200 g full)
Lighter stove options: the lightest backpacking stoves. Then add the fuel to your list in the pack builder.
For one person boiling water for two meals and a drink, roughly 15–20 g of canister fuel a day in mild weather with a canister stove, less with an integrated system like a Jetboil. Cold and wind can double it.
A 100 g canister boils about 8 L of water on a typical canister stove and about 12 L on an integrated system in mild conditions — roughly 3–5 days for one person cooking two hot meals a day.
Yes. Colder water takes more heat to boil and canister pressure drops near freezing, so plan on 20–50% more fuel, and keep the canister warm before cooking.
Planning water as well? How much water to carry. Building your list? Pack builder · The Shakedown.