How does Apple Health know my weight?


Author bio

Page last updated: 28/09/2022

How does Apple Health know my weight?

In this guide, we will discuss how Apple Health knows my weight, how helpful it is to track your weight and some additional considerations when using Apple Health to lose or maintain your weight. Also, we will talk about how the Apple Health app works, how important it could be to log food and nutrition, logging body and composition measurements and menstrual cycle and fertility.

How does Apple Health know my weight?

You may think, ‘How does Apple Health know my weight?’ and there is a very simple answer. Apple Health tracks your weight changes but it won’t know automatically how much you weigh unless you input the data manually. However, we must say that for users wanting to lose weight it can be tremendously helpful and motivating. Imagine you start using the app and you input your weight at 80 kg. 

After a few weeks, you would like to check on your progress and you see the stats are showing you a considerable weight loss of 10 kg, very motivating isn’t it? All your hard work over the weeks combined with the proper nutrition can show you the results you have been yearning for. 

Some people struggle losing weight, others keep gaining and others simply want to keep their current weight. For any of these reasons, you can use the Apple Health app to track your weight.

How does the Health app work?

The Apple Health app is believed to be one of the most comprehensive and useful fitness apps that allows you to view all your health data in one place. With this app, you can keep your data organized since it works as a centralized hub that pulls information from third-party apps and devices. They include running or step trackers, sleep trackers, food and nutrition diaries and even reproductive health trackers. 

Moreover, some other health functions even include mindfulness. Once you have finished the setup, setting and meeting your health goals becomes easier. Subsequently, it is not true that you only need to have Apple devices to use the Health app there are a variety of third-party apps and devices you could also use. 

However, it is widely known that the Health app uses your iPhone’s accelerometer to measure things as steps or distance travelled as long as you keep your phone with you most of the time, meaning you don’t actually need any other device or tracker for the Health app to work.

How does Apple Health know my weight?

Food and Nutrition

It is becoming increasingly accepted that exercising or working out regularly is not the only key to losing weight or keeping a healthy lifestyle. Nutrition is also an important factor that becomes more powerful when combined with physical activity. Many nutritionists and health professionals recommend both nutrition and exercise if you would like to keep a healthy lifestyle.

Apple health can become quite useful not only in terms of tracking your physical activity but also food and nutrition. You can use the nutrition tile in Health to track your food intake, but it requires you to input everything manually. Other apps such as MyFitnessPal or Lifesum can make it easier in terms of tracking nutrition and the best thing is that it can sync with the Health app making your life easier. 

As indicated on, “Within the nutrition tile, you’ll get a breakdown of your macronutrients and micronutrients for the day, month and year, if you use an app that integrates with Health or if you input all of your data manually”.

Weight loss 

This may be one of the most common reasons why people would like to start keeping an eye on what they eat but others would simply want to maintain their current weight doing the same. If you want to lose weight, the Health app can keep track of what you eat and how much. 

If you would like to start tracking your weight-loss progress, simply open ‘Health Data’ and then ‘Body Measurements’. If you have entered this information before, you will find it at the top of the screen in orange, if not, simply fill it out by tapping on ‘Weight’ below ‘No Recorded Data’.

Finally, you can see the Weight Data recorded that you have entered manually as well as the information that has been pulled from other apps all condensed into the Health app.

Body composition and other measurements

When we are trying to lose weight, we try to follow tips from people who have lost weight thinking everything they say will apply to us. The truth is, it is not always the case since what has been working for your best friend, may not apply to you. This is why it is important to get some help from a nutritionist or someone that can tell us what we could eat and the portions since everyone is different and reacts differently to sudden changes in food and nutrition.

We are no nutrition experts but the Health app is not only helpful if you want to track your weight, but it also allows you to add more information such as your height, body fat percentage, body mass index and waist circumference. 

For instance, let’s say that your goal is to lose weight so you would probably be interested in burning calories, keeping an eye on nutrition and tracking your weight. 

Menstrual Cycle and Fertility

This feature I find one of the most interesting and useful. If you are like me, I always forget when my next menstrual cycle is supposed to start and sometimes it has become quite uncomfortable at times. Moreover, if you are planning to get pregnant you can also use it to track fertility windows of opportunity. 

Since 2019 with the iOS 13 and the WatchOS6, tracking and logging your menstruation cycle has been made possible with the Cycle Tracking feature. It is available as an app on the Apple Watch but it is also built into the Health app. Additionally, if you prefer, you can also use a third-party app and pull the data right from the Health app.

Within the Cycle Tracking, you can see a calendar and the days estimated for you to ovulate and the days you have your period would be highlighted. You can also add some of the regular symptoms during your cycles such as the painful and annoying cramps, basal body temperature, mood swings and even the results from ovulation tests. 

Why is this blog about How does Apple Health know my weight important?

As we have discussed how apple health knows my body weight, it is not precisely done automatically but we will need to configure it during setup. Additionally, if you are on a weight loss journey then you could track down your weight and see any changes in time. 

Finally, we have seen how Apple Health serves as a centralized hub where you not only have the option to track your weight but other comprehensive and useful measurements. Finally, tracking your food and nutrition may become quite handy but if it gets too complicated because you have to enter the information in the precise amounts or quantities, you can always use one of the third-party compatible apps.

Please feel free to leave any comments or thoughts about the content of this article!

Frequently Asked Questions (FAQs) about How does Apple Health know my weight

Does Apple Watch know your weight?

Apple Watch won’t know your weight if you don’t input your personal information. Additional to your weight it will ask for your height, gender and age to calculate or estimate how many calories you have burned and more. 

How does Apple Health Track your weight?

Your Apple Health tracks your weight if you go into Health Data> Body Measurements> Weight and tap Add Data Point. Every day when you weigh yourself, you can add your daily measurement and track your weight. You can even toggle the ‘Show on Dashboard’ option to On so you can see your Weight on the Dashboard screen. 

Can your iPhone tell you how much you weigh?

Digital Scale+ is a working, functional weight scale utilising the 3D Touch capability on iPhone to measure weight. Just open the app in Safari using your iPhone with 3D Touch (iPhone 6S/7/8/X/XS ONLY) and start measuring.

How do I change my weight on Apple Health app?

To change your weight on Apple Health app on your iPhone, tap My Watch> tap Health, Weight, or Height and adjust as needed. First, open the watch app on your phone, tap the ‘My Watch’ tab and scroll down to the health tab, tap on edit on the top and then you can change any of the health-related settings (including height and weight).

Do Apple watches help you lose weight?

Apple watches can help you lose weight since it can help you track calories, weight changes, habits and much more. If you are planning on embarking on a weight loss journey.