3 Hartree to Millijoule
Quick answer
3 Hartree (Eh) equals
1.307923e-14 mJ
To convert 3 Hartrees to Millijoules, multiply by 4.359745e-15. Therefore, 3 Hartree (Eh) equals 1.307923e-14 Millijoule (mJ).
Formula: mJ = Eh × 4.359745e-15. Calculation: 3 × 4.359745e-15 = 1.307923e-14 mJ.
Convert Hartree (Eh) to Millijoule (mJ) online with our free unit converter. In energy, 1 Eh = 4.359745e-15 mJ. Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.
Worked example: converting Hartree to Millijoule
- Step 1 — start with the formula. mJ = Eh × 4.359745e-15
- Step 2 — substitute your figure. 3 Eh × 4.359745e-15
- Step 3 — read the result. 3 Eh = 1.307923e-14 mJ
- Step 4 — check it in reverse. Eh = mJ × 2.293712e+14 returns 3 Eh, which matches the figure you started with.
Energy Converter
27 units available
3 Eh = 1.307923e-14 mJ
Formula:
mJ = Eh × 4.359745e-15With your value: 3 Eh = 1.307923e-14 mJ
How big is that?
Everyday references on a logarithmic scale, all expressed in hartree so you can sanity-check the result.
Other Hartree to Millijoule conversions
Hartree to Millijoule Conversion Table
| Hartree (Eh) | Millijoule (mJ) |
|---|---|
| 0.5 | 2.179872e-15 |
| 1 | 4.359745e-15 |
| 2 | 8.719489e-15 |
| 5 | 2.179872e-14 |
| 10 | 4.359745e-14 |
| 15 | 6.539617e-14 |
| 20 | 8.719489e-14 |
| 25 | 1.089936e-13 |
| 50 | 2.179872e-13 |
| 100 | 4.359745e-13 |
| 250 | 1.089936e-12 |
| 500 | 2.179872e-12 |
| 1000 | 4.359745e-12 |
Millijoule to Hartree Conversion Table
| Millijoule (mJ) | Hartree (Eh) |
|---|---|
| 0.5 | 1.146856e+14 |
| 1 | 2.293712e+14 |
| 2 | 4.587425e+14 |
| 5 | 1.146856e+15 |
| 10 | 2.293712e+15 |
| 15 | 3.440568e+15 |
| 20 | 4.587425e+15 |
| 25 | 5.734281e+15 |
| 50 | 1.146856e+16 |
| 100 | 2.293712e+16 |
| 250 | 5.734281e+16 |
| 500 | 1.146856e+17 |
| 1000 | 2.293712e+17 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Hartree (Eh)
Energy
Derived from the joule (1 J = 1 kg·m²/s²). Thermochemical and IT calories, BTU and kWh are exact defined multiples.
Source: NIST Special Publication 811, Guide for the Use of the International System of Units
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
Millijoule (mJ)
Energy
Derived from the joule (1 J = 1 kg·m²/s²). Thermochemical and IT calories, BTU and kWh are exact defined multiples.
Source: NIST Special Publication 811, Guide for the Use of the International System of Units
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
How to Convert Hartree to Millijoule
To convert from Hartree (Eh) to Millijoule (mJ), multiply the value by 4.359745e-15.
Formula: mJ = Eh × 4.359745e-15
Reverse: Eh = mJ × 2.293712e+14
Step-by-Step Example
- Start with your value in Hartree. For example: 5 Eh
- Multiply by the conversion factor: 5 x 4.359745e-15
- The result is: 2.179872e-14 mJ
Hartree and Millijoule Relationship
This calculation facilitates standardized conversion between recognized units of energy. Since 1 Hartree represents a fraction of a Millijoule (1 Millijoule ≈ 2.294e+14 Hartrees), the Millijoule is the larger measurement interval. Understanding the relationship between Hartree and Millijoule is essential for accurate calculations in physics, engineering, commerce, and daily applications.
About Hartree
The Hartree (symbol: Eh) is a recognized unit in the Standard measurement framework, utilized within energy applications for precision and standardized data representation.
Common uses of Hartree: energy calculations, engineering and science, education.
About Millijoule
The Millijoule (symbol: mJ) is a recognized unit in the Metric (SI) measurement framework, utilized within energy applications for precision and standardized data representation.
Common uses of Millijoule: energy calculations, engineering and science, education.
Frequently Asked Questions
- What is 3 Hartree in Millijoule?
- 3 Hartree equals 1.307923e-14 Millijoule.
- How many Millijoules are in 1 Hartree?
- There are exactly 4.359745e-15 Millijoules in 1 Hartree. This means the conversion factor from Hartree to Millijoule is 4.359745e-15.
- What is the formula to convert Hartree to Millijoule?
- The formula to convert Hartree to Millijoule is: mJ = Eh × 4.359745e-15. For example, to convert 10 Hartrees to Millijoules, you would multiply 10 by 4.359745e-15.
- What is a Hartree?
- The Hartree (symbol: Eh) is a recognized unit in the Standard measurement framework, utilized within energy applications for precision and standardized data representation.
- What is a Millijoule?
- The Millijoule (symbol: mJ) is a recognized unit in the Metric (SI) measurement framework, utilized within energy applications for precision and standardized data representation.
- What are the common uses of Hartree?
- The Hartree is commonly used in energy calculations, engineering and science, education.
Related Energy Conversions
Cite this page
UnitConvertLab. (2026). 3 Hartree to Millijoule. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/3-hartree-to-millijoule