GLP-1 weight log: dates, pounds and kilograms

What belongs in a weight entry

When adding an older measurement, choose the date it was taken rather than the day you opened the diary. Keep the original unit visible even if you make a converted copy for comparison.

Keep the conditions understandable

NHS England’s recording guidance recommends using the same scale on a firm, level surface, at a consistent time and with similar clothing. Those details make comparisons easier to understand.

If a reading comes from a different scale or a clinic visit, note the source. You can keep the measurement and its context rather than discarding it. Discuss an appropriate weighing frequency with your healthcare professional; this worksheet does not prescribe one.

Check pounds and kilograms before comparing

The NIST unit tables define 1 lb as 0.45359237 kg. Multiply a value in pounds by that factor to convert it to kilograms.

Conversion example, not a goal: 176.4 lb × 0.45359237 ≈ 80.0 kg, rounded to one decimal place. Comparing 176.4 directly with 80.0 would confuse the units with a change in body weight.

Retain the original reading. Rounding a converted value does not make the scale more precise. If a spreadsheet uses a different decimal separator, check how it reads your number before relying on its chart.

A missing reading is not a zero

If you did not weigh yourself, leave the value missing. Entering zero or copying a previous weight would create a measurement you do not have. Flag an uncertain date instead of silently assigning an older reading to a new day.

Before correcting an unexpected jump, look at the original note, unit and source and check for duplicate entries. A typing error can substantially change the shape of a chart.

Read the chart as a record of measurements

A weight history does not by itself show how much fat or muscle changed, explain the cause of a variation or evaluate whether a medicine is working for you.

It is also different from an estimated medication-level curve: scale readings and model estimates describe different things. Neither is a reason to change treatment on your own. Bring the original entries and your question to your healthcare professional.

Keep it in CalZen or in your own file

CalZen lets you save weight with a selected date and review your history alongside other records. Check the date and units when adding a past measurement. The recording screens are shared on iPhone and Android.

The CSV is a separate blank worksheet, not an automatic app import or export. It does not set a target weight or forecast a rate of weight loss. If tracking becomes distressing or difficult to manage, discuss the approach with your care team.