A 500ml Mason jar of honey = 1 pound 8.5 oz / 24.5 oz / 695 grams. That’s 1.39 grams per millilitre of honey.

A 250ml Mason jar of honey = 11.45 oz / 325 grams. That’s 1.3 grams per millilitre of honey.

Both minus the weight of the jar. It looks like the 500ml jars (a pint of honey) provides a bigger bang for the buck with an extra 45 grams crammed in there. I don’t know which jar has the most accurate measurement, but an average of the two comes to 1.345 grams per millilitre of honey.

In any case, I’ve never understood why honey is sold by weight instead of volume — by the size of the jar it’s sold in. But whatever the reason, I decided to see how heavy honey in a jar comes in at so that I can calculate a price for selling it by weight. That’s it.

September 10th, 2021: According to this website, one millilitre of honey is exactly 1.437 grams. I’m assuming something other than a kitchen scale was used to determine that number. The highest number I got was 1.39 grams.

In any case, it seems to me that the main reason honey would be sold by weight instead of volume is that the weight measurements result in a larger number. 250ml of honey sounds better at 359g. A 500ml jar (one pint) is nearly 720g. That’s if we go with the 1.437 grams per ML math. It makes sense now.