Does the Diameter of Your Cooking Pot Matter?

We tested 5 different diameter pots.

To see if the diameter of titanium pots make a difference in fuel consumption, we tested five different diameter pots varying from 78 mm (3.1 inches) to 133 mm (5.2 inches). We calculated the amount of fuel consumed to boil 1 cup of water using the MSR PocketRocket 2 and the Soto WindMaster. We tested each pot three times for each stove tested and then averaged the result.

Larger diameter pots performed better in every test.

We were surprised to learn that the larger diameter pots performed better than the narrower pots for both stoves tested. The MSR PocketRocket 2 was 43% more fuel efficient with the wider (133 mm) pot than the narrow (78 mm) pot. The Soto WindMaster, however, was only 21% more fuel efficient with the wider pot than the narrow pot.

Why do larger pots perform so much better?

We noticed the sides of the small (78mm/3.1-inch) diameter pot became much hotter than the larger diameter pots after each boil. This suggests that the flame from the stove is warming up the sides of the pot instead of the bottom of the pot (where the greatest area of water is). The picture below shows the flame wrapping around the smaller pot when using the Pocket Rocket 2.  The less efficient Pocket Rocket 2 becomes more efficient as the larger diameter pot captures more of the flame.

Summary

• Larger diameter pots result in less fuel consumption than smaller diameter pots.
• A less fuel-efficient stove can be made more efficient by using a larger diameter pot.

The blue flame remains under the larger pot.

The blue flame wraps around the side of the smaller pot.

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