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Apple Health metrics › Body Weight
Body Weight on Apple Watch and iPhone
Your weight trend from a smart scale or manual entries.
Where to find itHealth app > Browse > Body Measurements > Weight
What it is
Daily weight fluctuates by a kilogram or more from water and food. The trend over weeks tells the real story.
How Apple measures it
Apple Health stores weight from connected scales and manual entries.
What's a normal range?
A healthy weight depends on height and body composition. BMI is a rough screening tool.
What moves it
- Water, salt and carbs
- Time of day
- Training and recovery
- Menstrual cycle
- Medication
See Body Weight next to your other vitals
Apple Health keeps this number several taps deep. OnlyVitals puts the metrics you pick, including Body Weight, on a single dashboard so you can read them at a glance. Everything stays on your device.
One screen for the health numbers you care about.
Get OnlyVitals on the App StoreFrequently asked questions
How often should I weigh myself?
Weekly or a few times a week at the same time of day is enough. Look at the average, not single readings.
Why does my weight change daily?
Water, sodium, food in the gut and hormones move it by a kilogram or two without changing body fat.
Related metrics
- Body Mass Index (BMI)
- Body Fat Percentage
- Resting Heart Rate
- Heart Rate Variability (HRV)
- VO2 Max (Cardio Fitness)
- Blood Oxygen (SpO2)
This page is general information, not medical advice. Ranges vary by age, sex, fitness and device. Talk to a clinician about anything that worries you.