Three out of five adults are unable to equate alcohol units to drinks, according to research by alcohol awareness charity Drinkaware.
A survey of 4,000 adults found that while 85 per cent have heard of the term 'alcohol units' only one in two know how many are in certain drinks.
The survey also revealed less than a third of adults know the recommended daily unit guidelines (three to four for men and two to three for women).
In response, Drinkaware has sent 2.3 million unit and calorie counters to UK homes.
Chris Sorek, chief executive of Drinkaware, said: "Changing the UK's drinking culture won't happen overnight but providing consumers with useful tools such as the unit calculator can help them understand what a unit is and how many are in the nation's most popular drinks."
As a further incentive for people to have a healthy start to the New Year each Drinkaware unit calculator recipient will have the chance to enter a prize draw to win a weekend for two at Champneys luxury spa.
The first 10,000 entries at www.drinkaware.co.uk will also receive a free unit measure cup.
A standard pint of lager (four per cent ABV) is equivalent to around two units.