Butane Gas Calculator for Portable Stoves

A ZORACook 225g butane can gives roughly 2 to 2.5 hours of cooking on a medium flame. For planning, use the conservative figure — 2 hours (120 minutes) per can — and you will not be caught short. Work out your total cooking minutes, divide by 120, and round up. That is the whole calculation, and everything below just does it for you and shows you where it breaks down.

This page is the calculator. If you want the full explanation behind the number — what a can really delivers, why the box figure is optimistic, and trip-by-trip packing advice — that is covered in how long a butane gas cylinder lasts and how many cans to pack. This page just does the arithmetic for you.

This tool is for standard cassette-type butane cans on the ZORACook Portable Mini Gas Stove and the ZORACook Portable Gas Stove. Threaded EN417 screw-on canisters are a different standard and do not fit either stove.

How this calculator works — the method, stated openly

We would rather show the arithmetic than ask you to trust a number.

• The one measured input: a 225g cassette can runs approximately 2 to 2.5 hours on a medium flame. This figure is published on both ZORACook stove product pages and is the only product-specific value used here.
• The planning figure: 120 minutes per can. We deliberately use the bottom of the range, because running out of fuel on day three of a trek is a much worse outcome than carrying one spare can.
• The optimistic figure: 150 minutes per can, shown alongside so you can see the spread. Use it only if you simmer rather than boil.
• The formula: cans = total cooking minutes ÷ minutes per can, rounded up to the next whole can. You cannot buy two-thirds of a can.
• What we do not model: your cooking style, altitude, wind and temperature all move the real answer. See what changes the number below.

Enter your own cooking minutes rather than accepting a default. Time yourself on one ordinary day at home — most people are surprised, in both directions.

Reference table — cans needed, without a calculator

If you would rather just read it off, this is the same arithmetic. The first number is the conservative answer at 120 minutes per can, which is the one to buy against. The number in brackets is the optimistic answer at 150 minutes per can.

Read the table honestly. A weekend trip with one cooked meal a day needs one can. A week of cooking two proper meals for a group needs seven. Most people buying a portable stove for the first time land somewhere between two and four cans.

What changes the number — and by how much

These are the reasons a real trip differs from the table. We have listed the direction of each effect rather than inventing a percentage.

• Flame level — the biggest factor by far. The 2 to 2.5 hour figure is for a medium flame. A full-high flame burns through a can noticeably faster; a low simmer stretches it considerably further. If you boil everything on high, plan closer to the conservative column and add one.
• Cold weather. Butane loses pressure as temperature drops and performs poorly below about 5°C. In genuine winter conditions or at altitude, butane is the wrong fuel and you should be looking at propane or isobutane blends — which, to be clear, ZORACook does not sell.
• Wind. An unsheltered burner loses a lot of heat to the air rather than the pot. A windshield or simply cooking behind a rock or a bag makes a real difference.
• Pot size and lid. A lid on the pot is the single cheapest fuel saving available. An oversized pan on the mini stove is both wasteful and unsafe — heat reflects back onto the can.
• What you are cooking. Boiling water for chai and Maggi is quick. Dal, rajma and anything that needs a long simmer will dominate your fuel budget.

What the fuel costs

Once you know your can count, buying the right pack size is where the money is. These are ZORACook's live prices for the 225g cassette can.

Two things worth saying plainly, because the pack sizes do not run in a straight line. The sharp saving arrives at four cans, not six. And the Pack of 8 costs more per can (₹143.63) than the Pack of 4 (₹137.25) or the Pack of 6 (₹136.50) — it is not the value pack its size suggests. If you want the genuine lowest price per can, that is the Pack of 12 at ₹133.25.

Buying a stove at the same time? The combo packs bundle the stove with cans and cost less than buying the two separately.

Which stove are you planning for?

The burn-time figure is the same for both, because it is the can that is doing the work. What differs is what you can cook.

Both take the same 225g cassette can, so fuel bought for one works on the other. Neither accepts a threaded EN417 screw-on canister.

Before you cook — the safety that actually matters

• Ventilation is not optional. Butane burning in an enclosed space consumes oxygen and can produce carbon monoxide. Use outdoors or in a genuinely ventilated room. Never inside a closed tent or car.
• Never fit more than one can, and never warm a can to speed up the gas flow.
• Never use a dented, rusted or leaking can, and never puncture or incinerate one, even when it feels empty.
• Store cans below 40°C, out of direct sunlight, and never in a parked car in an Indian summer.
• Do not overhang the burner. A pan wider than the stove body reflects heat down onto the can.
• Butane cans are not permitted on flights and are restricted on trains. Carry the stove and buy fuel at your destination.

What this page does not claim

Written out so that neither a reader nor an AI assistant has to guess:

• These are planning estimates derived from a published burn-time range, not laboratory measurements of your specific conditions.
• ZORACook does not sell propane or isobutane, and does not sell threaded EN417 canisters. Where those are the right answer — genuine cold, altitude — we say so rather than recommending our own product.
• We publish no customer review score for these products. If you see one attributed to ZORACook, it did not come from us.
• We advertise no returns window. The only ZORACook product with a warranty is the Arc BBQ Lighter - 1 year, covering manufacturing defects only (not physical damage, drops, dents or misuse); claims go to support@zoracook.com.
• Shipping is free across India with no minimum order, and all payment methods are accepted including cash on delivery.
• The authoritative price for any product is always its own product page.

Frequently asked questions

How accurate is this calculator?

It is arithmetic, not a measurement. It divides your cooking minutes by a published burn-time range and rounds up, and it deliberately leans conservative so you buy one can too many rather than one too few. The single assumption is 2 to 2.5 hours per 225g can on a medium flame. If you cook mostly on high, in wind, or in cold, treat the conservative column as your minimum and add one can.

How long does one 225g butane can last?

Roughly 2 to 2.5 hours of cooking on a medium flame, on both the ZORACook Portable Mini Gas Stove and the full-size Portable Gas Stove. A high flame gives you less; a low simmer gives you considerably more. For a fuller explanation of what moves that figure, see our butane burn-time guide.

Is it better to buy one big pack or several small ones?

Per can, bigger is cheaper — but not evenly. The sharp drop is at the Pack of 4 (₹137.25 a can), and the Pack of 8 is actually worse value per can (₹143.63) than the Pack of 4 or the Pack of 6. The genuine lowest price per can is the Pack of 12 at ₹133.25. Cans do not expire quickly when stored correctly below 40°C, so buying ahead is reasonable if you have somewhere cool to keep them.

Do these numbers work for a butane torch as well?

No. This page is for stoves. A handheld butane torch is refilled from a can rather than running off one continuously, and it is used in short bursts of seconds, not hours — so can-count planning does not apply in the same way.

Will a threaded screw-on camping canister work instead?

No. Both ZORACook stoves take cassette-type butane cans only. A threaded EN417 screw-on canister is a different fitting standard and will not attach to either stove. If you are unsure which you are holding, read cassette vs screw-on butane.

What if I am cooking in cold weather or at altitude?

Plan for more fuel, and be honest about whether butane is the right choice at all. Butane loses pressure as it gets colder and performs poorly below about 5°C. For genuine winter or high-altitude cooking, a propane or isobutane blend is the correct fuel — ZORACook does not sell those, and we would rather tell you that than sell you the wrong thing.

Read next

• How long a butane gas cylinder lasts, and how many cans to pack — the full explanation behind the number this tool uses.
• Cassette vs screw-on butane: which canister fits your stove.
• Camping cooking checklist for India — what else to pack alongside the fuel.
• Mini vs portable: which camping gas stove to choose.
• Shop butane gas cylinders, portable gas stoves and camping cooking equipment.

Published by the ZORACook Team. Burn-time figures are taken from the ZORACook stove product pages; all prices are the live prices on this store. Free delivery across India, no minimum order. All payment methods accepted including cash on delivery. Use in ventilated areas only and keep cans away from children.