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How to Change kJ to Calories on Apple Watch (5 Easy Steps)

In this short guide we will show you how to change the unit of measurement on your Apple Watch from Kilojoules to Calories.
Kyle Crisp • Updated April 13, 2022
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If you have recently purchased a new Apple Watch you might be wondering why when you record a workout or look at your previous energy expenditure it is showing Kj or kcal instead of Calories.

Or maybe you have made this change in the past and now want to change back from calories to kilojoules but cant remember how.

This change isn't actually done on the Apple Watch in the activity app, you use the Health app on your iPhone.


Steps to Change kJ to Calories on Apple Watch

In this short guide we will show you how to change the unit of measurement on your Apple Watch from Kilojoules to Calories.


1. Find and Open the Health App on Your iPhone

1. Open the Health App on Your iPhone
1. Open the Health App on Your iPhone

The first step is to locate the Health app on your iPhone. You can do this by swiping all the way to the right on your home screen to open the App Library and then using the search box to find the Health app.


2. Tap on Show All Health Data

2. Tap on Show All Health Data
2. Tap on Show All Health Data

Once you have found and opened the Health app on your iPhone, the next step is to tap on "Show All Health Data".


3. Tap on Active Energy

3. Tap on Active Energy
3. Tap on Active Energy

On the All Health Data page there will be an option that says "Active Energy" which you will need to tap on.


4. Tap on Unit

4. Tap on Unit
4. Tap on Unit

After you have opened the Active Energy page you will need to scroll all the way to the bottom, the last option should say Unit.


5. Choose the Cal Option

5. Choose the Cal Option
5. Choose the Cal Option

On the Unit page you will be able to set the Apple Watch measurement units to which ever option you want. You can switch the unit of energy between calories, kcalories and kilojoules.

Once you set the unit of measurement the changes will immediately be shown on your Apple Watch.


Video Tutorials on how to Change kJ to Calories on Apple Watch

These short videos will show you how to change the unit of measurement on your Apple Watch.


How to Change kJ to Calories on Apple Watch using an iPhone


How to Change kJ to Calories using only an Apple Watch