When to weigh yourself

The answer is short, so here it is: first thing, after the toilet, before food or drink, roughly the same clothing. Then the rest of this page explains why the consistency matters more than the hour.

1. 01 On waking Before food, drink or training
2. 02 After the toilet An empty bladder is the biggest single variable
3. 03 Same clothing Nothing, or the same light clothing each time

Why morning

Not because morning weight is your true weight — there is no such thing — but because it is the moment of the day with the fewest variables in it. You have not eaten, drunk, trained or been on your feet.

Any consistent time works in principle. Morning simply has the least going on.

What you are actually controlling

Food and fluid still in the digestive tract, which can be a kilo or more by evening.

Bladder contents, which is the single largest short-term variable and free to remove.

Clothing, which is trivial to standardise and otherwise adds half a kilo at random.

Frequency

Weigh most days and read the seven-day average. That averages out water shifts, salt and training fluid, and it is what any sensible tracker plots.

If a daily number makes you miserable, weigh once a week under identical conditions instead. The best protocol is the one you will actually follow without it costing you anything.

Questions