How to track alcohol without ruining the week

Alcohol is the item people most often decide not to log, which is unfortunate because it is one of the few things in a normal diet that is easy to count precisely. A drink comes in a standard measure. It has no cooking oil in it. Nobody serves you an estimated pint.

The difficulty is not measurement. It is everything that happens around the drinking.

What a drink costs

Alcohol supplies about 7 kcal per gram — between carbohydrate and fat. The rest of a drink's calories come from residual sugar or whatever it is mixed with.

• Beer, 330 ml, regular strength: 140 to 160 kcal
• Beer, 500 ml pint: 210 to 250 kcal
• Strong or craft beer, 330 ml: 200 to 280 kcal
• Wine, 150 ml glass: 120 to 130 kcal
• Spirits, 30 ml measure, neat: 65 kcal
• Spirit with a full-sugar mixer, 300 ml: 150 to 200 kcal
• Cocktail: 200 to 500 kcal, driven by syrup and juice

Four beers is around 600 kcal. That is not a catastrophe and it is not nothing — it is roughly a fifth of a typical day, from something that does not register as eating.

The indirect cost is usually larger

This is the part that determines whether a night out shows up in your weight.

Alcohol reduces inhibition around food in a way that is well documented and universally recognised by anyone who has ordered at eleven at night. It also delays the sensation of fullness. The result is that drinking sessions are accompanied by substantially more food than the same evening without them.

In practice, the 600 kcal of beer is often joined by 900 kcal of food that would not otherwise have been eaten. The drinks are the visible part of a larger number.

Knowing this does not require abstaining. It requires deciding what you will eat before the first drink, which is a much easier decision than the one available at eleven.

Log as you order

Reconstructing a night the next morning is unreliable, and unreliable in a specific direction: people undercount drinks. The third and fourth become "a couple".

Log each drink as it arrives. It takes two seconds, the entries are standard so no searching is needed, and it also has the side effect of making the count visible while you can still act on it.

If logging at the table feels intrusive, keep a tally in your head with a fixed number attached — "each of these is 150" — and enter the total before bed.

A default for a night out

Use one number and stop calculating.

• Two or three drinks with a meal: add 400 kcal to the meal estimate
• A proper night out, five or more drinks plus late food: log 1,500 kcal for the evening
• A wedding or a party with both: log 2,000 kcal

These are generous on purpose, for the reason set out in how to log a restaurant meal you didn't cook: an overestimate keeps the week honest, a blank does not.

What the scale does afterwards

It goes up, often by a kilogram or more, and it is not fat.

Alcohol disrupts fluid balance, the food eaten alongside it is typically saltier and larger in volume, and carbohydrate eaten late brings water into glycogen stores. All three resolve within a couple of days.

The mistake is reacting to Sunday's number with Monday's crash diet, which starts a cycle that costs more than the night did. The correct response is to return to your normal intake and wait for the seven-day average, as explained in why the scale went up overnight when you did nothing.

Where it fits in a fat loss phase

Alcohol is not forbidden and it is expensive relative to how full it makes you. Zero satiety, meaningful calories, and a knock-on effect on food.

Most people who are losing fat successfully and still drinking have settled on one of two patterns: fewer occasions at normal volume, or the same occasions at lower volume — spirits with soda rather than beer, one glass rather than three.

Neither requires giving anything up permanently. Both make the arithmetic survivable, which is the same logic as cheat meals, refeeds, and what a big day costs.

Mixers and the hidden half of a drink

The spirit is rarely the expensive part. A 30 ml peg is 65 kcal; the 250 ml of cola it arrives in is another 105, and the 200 ml of mango juice in a cocktail can be 100 more on top of syrup.

Switching every mixer to soda water, diet cola or plain water removes 100 to 150 kcal per drink without touching how many you have. Over an evening of five drinks that is 500 to 750 kcal — larger than any adjustment you could make to dinner.

The same logic applies to beer strength. A 4 per cent lager and an 8 per cent craft beer are the same volume and roughly double the calories, because the alcohol itself is most of the energy.

Recording it honestly in a log

One practical note. Many apps let you log alcohol as a food, which works, but it is worth keeping drinks as their own saved entries — "beer 330 ml", "wine glass", "peg with soda" — rather than burying them inside a restaurant meal estimate.

The reason is diagnostic. When a month goes badly and you look back, an entry that says four drinks on eleven separate evenings tells you something a single line reading "dinner out, 1,800" does not. Making drinking visible in the record is how most people discover it is a bigger part of their average than they assumed.

The training question

Heavy drinking impairs recovery, sleep quality and performance the following day, which shows up in a training log before it shows up anywhere else.

If you keep a log, you will see it: the session two days after a night out is often flat. That is not a reason to stop drinking, but it is a reason to place the drinking away from the sessions you care about, and it is the kind of pattern that only becomes visible when food and training sit in the same record — the argument in why food and training belong in the same log.