Convert 1 Joule to Millijoule (1 J to mJ)
Looking to convert 1 joule (J) to millijoule (mJ)? This page provides the accurate result and a detailed explanation of how the conversion is done. Use this information to understand the relationship between Joule and Millijoule and how to calculate conversions manually or using online tools.

Looking to convert 1 joule (J) to millijoule (mJ)? This page provides the accurate result and a detailed explanation of how the conversion is done. Use this information to understand the relationship between Joule and Millijoule and how to calculate conversions manually or using online tools.
What is Joule to Millijoule Conversion?
Joule (J) and millijoule (mJ) are both units used to measure energy, but they serve different purposes depending on the scale of the measurement. If you ever need to convert joule to millijoule, knowing the exact conversion formula is essential.
J to mj Conversion Formula:
One Joule is equal to 1000 Millijoule.
Formula: 1 J = 1000 mJ
By using this conversion factor, you can easily convert any energy from joule to millijoule with precision.
Convert 1 Joule to Millijoule
To convert 1 joule to millijoule, multiply the value by 1000 since:
1 joule = 1000 millijoule
So:
1 × 1000 = 1000
Result: 1 joule = 1000 millijoule
Reverse Conversion
Need the reverse result? You can also convert millijoule back to joule by dividing 1000:
1000 millijoule ÷ 1000 = 1 joule
For more, visit: Millijoule to Joule
Explore Related Conversion Tool
This page focuses specifically on converting 1 Joule to Millijoule. If you're looking to convert a different value, you can use our general conversion tool:
Frequently Asked Questions
What is 1 joule in millijoule?
1 joule is equal to 1000 millijoule.
How do I convert joule to millijoule?
Multiply the value in joule by 1000 to get the equivalent in millijoule.