A useful weight record starts with a repeatable routine. Choose the same scale and location, rather than comparing a hotel scale after dinner with a morning reading at home.

Place the scale on a firm, level floor and follow its setup instructions. Stand still until the display settles. Check whether the number is in kilograms or pounds before saving it.

Use similar light clothing and a similar time of day. NHS guidance suggests regular weekly to monthly checks, unless a healthcare professional has given you a different monitoring plan.

Write the date, weight and unit. Add a short note if you used different equipment. You do not need to explain every decimal or keep stepping back on the scale.

Food, fluid and water retention can change a reading. One result cannot tell you how much body fat changed. Return to comparable conditions instead of skipping meals or changing medicine doses.

Discuss ongoing unintentional weight loss with a healthcare professional. If weighing causes distress or compulsive checking, ask about another approach. The full guide includes a simple record you can use.