Obviously the change is in format only I assume. So how does weighing fluid differ from weighing solids?
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Liquid units are useless if the scale cannot be told what the substance being weighed is to look up is density. I’ve never seen a scale where you could preset the density, but maybe they exist. Usually they assume the density of water. And if there is a button for cycling through all units, I have to press it an extra time.
Isn’t fluid ounces a measure of volume?
Unless it has sensor around the side of the bowl or you have an option to input what items you are weighing it shouldn’t be able to tell you fluid ounces.
If it doesn’t have either of those I’d guess the fluid ounces are calibrated on water which will work for most liquids. The density of milk ( 1.032kg / L ) is very close to that of water
what scale measures fluid ounces? that’s a unit of volume, not weight.
1g of water = 1ml of water, 28.3495g of water = 1fl oz. A gram is a weight measurement and a ml is a volume measurement. They happen to be the same with water but if you wanted to weigh something other than water you could search the density of the substance and do the math.
Corn syrup is denser and so more weight will fill the same volume, (1.4g corn syrup = 1ml corn syrup) If your recipe called for 1fl oz of corn syrup the weight measurement would be 1.4 * 28.3495 =39.6893 grams.
Oil is less dense than water but we can figure it out just the same. (0.9g oil = 1ml oil) 0.9 * 28.3496 = 25.51455 grams.
A kitchen digital scale can’t accurately switch between fluid ounces and weight ounces without knowing the density of the liquid. I don’t know of any with that function.
Thankfully, most watery liquids have 1 liquid ounce equal to one weight ounce. So if you use the scale for watery liquids, it doesn’t matter so much. But oil and many syrups have meaningful differences from the density of water. You can substantially screw up a recipe assuming 8 liquid ounces of corn syrup (ie 1 cup volume) is 8 weight ounces.
Happily (and oddly), butter has the same density as water, both solid and melted.
There are online guides showing the conversion between 1 cup of a product and the ounces required. Google “1 cup oil ounces”.
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