Convert millijoule to joule
Please provide values below to convert millijoule [mJ] to joule [J], or Convert joule to millijoule.
1 mJ = 0.001 J. To convert millijoule to joule, multiply the value by 0.001; to go the other way, divide by it (1 J = 1000 mJ). Both units measure energy and appear in everyday as well as technical calculations, so switching between them quickly is often useful.
Quick Reference
- 1 mJ = 0.001 J
- 1 J = 1000 mJ
- 10 mJ = 0.01 J
- 100 mJ = 0.1 J
How to Convert Millijoule to Joule
1 mJ = 0.001 J
Example: convert 15 mJ to J:
15 mJ = 15 × 0.001 J = 0.015 J
Millijoule to Joule Conversion Table
| millijoule | joule |
|---|---|
| 1 mJ | 0.001 J |
| 2 mJ | 0.002 J |
| 3 mJ | 0.003 J |
| 5 mJ | 0.005 J |
| 10 mJ | 0.01 J |
| 20 mJ | 0.02 J |
| 50 mJ | 0.05 J |
| 100 mJ | 0.1 J |
| 500 mJ | 0.5 J |
| 1000 mJ | 1 J |
Millijoule
A millijoule (mJ) is a unit of energy equal to one thousandth of a joule, where 1 joule equals 1 newton meter or 1 kg·m²/s².
History/Origin
The millijoule is derived from the SI base unit joule, with the prefix 'milli' indicating a factor of 10⁻³. It has been used in scientific and engineering contexts to measure small amounts of energy, especially in fields like electronics and biomechanics.
Current Use
The millijoule is commonly used today to quantify small energy quantities in electronics, biomedical applications, and energy measurements where precision at a small scale is required.
Joule
The joule (J) is the SI unit of energy, work, and heat, defined as the work done when a force of one newton acts over a distance of one meter.
History/Origin
The joule was named after James Prescott Joule in 1889 to honor his work in energy and thermodynamics. It was adopted as the SI unit of energy in 1948.
Current Use
The joule is widely used in physics, engineering, and everyday contexts to quantify energy, work, and heat in various applications, including electricity, mechanics, and thermodynamics.
Frequently Asked Questions
What is 1 millijoule in joule?
1 millijoule (mJ) = 0.001 joule (J).
How do you convert millijoule to joule?
Multiply the millijoule value by 0.001. For example, 25 mJ × 0.001 = 0.025 J.
What is 10 millijoule in joule?
10 mJ = 0.01 J.
Which unit is larger, the millijoule or the joule?
The joule is the larger unit: 1 mJ equals only 0.001 J.