A US quart is 947ml in the UK which equates to about a bottle and a 1/4 of wine here as our wine is sold in 750ml bottles. The UK determination of units is a little more complex as it multiplies the alcohol content of the drink by the volume (amount you drink) to get units where what O have seen of the US system is it’s measured in “drinks” and volume only but doesn’t take in to account the alcohol %. x