How manufacturers quote cooking pot capacities

Almost certainly varies from Mfg to Mfg. Safest to assume it is the “full to the brim” measurement.

The safe bet is that it varies by manufacturer.

Toaks are very consistent with speccing the true useful capacity. I have 3 of their pots.

They also list the “to the rim” volume, but only for some of their pots.

Evernew only list the “safe level” capacity as you called it.

I have no experience with others.

A few years ago there was a Ti pot that just about everybody sold.

(including BPL)

The exact same size pot was sold as a 500/550/600ml pot

It was about 600ml to the brim. (Toaks sold them as 550ml from memory)

A while ago I measured a few of my pots and found that Evernew pots were quite a bit larger capacity than the stated size.

700ml pasta pot ECA521 was 750ml to the brim

900ml ECA265 pot was 1025ml to the brim

MSR titan kettle (claimed 850ml) was 870ml to the brim

550ml mug sold by Ti Goat was 540ml.

Added

The easiest way to measure capacity is to put the pot on a set of scales and tare them (set the readout to zero). Pour in water and read the weight. 1 gram = 1millilitre – ah the joys of metric weights and measures.

Cross post from r/Ultralight? Then I’ll cross post my reply too!

FWIW I took out my scale and measured the two Toaks pots I own. Both the Toaks 450 and 850 hold exactly 450ml and 850ml of water respectively. The water was literally to the brim, barely contained by water tension. As in slightly bubbling over the top but not falling out.

Also, the 100ml markings inside the Toaks 850 are spot on.