Hartree to Rydberg Converter
Quick answer
To convert Hartrees to Rydbergs, multiply by 2.0000003313 (or divide by 0.4999999172). Therefore, 1 Hartree (Eh) equals 2.00000033 Rydbergs (Ry).
Formula: Ry = Eh × 2.0000003313. Worked example: 10 Eh = 20.000003 Ry.
Convert Hartree (Eh) to Rydberg (Ry) online with our free unit converter. In energy, 1 Eh = 2 Ry. Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.
Worked example: converting Hartree to Rydberg
- Step 1 — start with the formula. Ry = Eh × 2.0000003313
- Step 2 — substitute your figure. 10 Eh × 2.0000003313
- Step 3 — read the result. 10 Eh = 20.000003 Ry
- Step 4 — check it in reverse. Eh = Ry × 0.4999999172 returns 10 Eh, which matches the figure you started with.
Energy Converter
27 units available
1 Eh = 2 Ry
Formula:
Ry = Eh × 2.0000003313With your value: 1 Eh = 2.00000033 Ry
How big is that?
Everyday references on a logarithmic scale, all expressed in hartree so you can sanity-check the result.
Other Hartree to Rydberg conversions
Hartree to Rydberg Conversion Table
| Hartree (Eh) | Rydberg (Ry) |
|---|---|
| 0.5 | 1 |
| 1 | 2 |
| 2 | 4.000001 |
| 5 | 10.000002 |
| 10 | 20.000003 |
| 15 | 30.000005 |
| 20 | 40.000007 |
| 25 | 50.000008 |
| 50 | 100.000017 |
| 100 | 200.000033 |
| 250 | 500.000083 |
| 500 | 1,000.000166 |
| 1000 | 2,000.000331 |
Rydberg to Hartree Conversion Table
| Rydberg (Ry) | Hartree (Eh) |
|---|---|
| 0.5 | 0.25 |
| 1 | 0.5 |
| 2 | 1 |
| 5 | 2.5 |
| 10 | 4.999999 |
| 15 | 7.499999 |
| 20 | 9.999998 |
| 25 | 12.499998 |
| 50 | 24.999996 |
| 100 | 49.999992 |
| 250 | 124.999979 |
| 500 | 249.999959 |
| 1000 | 499.999917 |
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
Rydberg (Ry)
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 Rydberg
To convert from Hartree (Eh) to Rydberg (Ry), multiply the value by 2.0000003313.
Formula: Ry = Eh × 2.0000003313
Reverse: Eh = Ry × 0.4999999172
Step-by-Step Example
- Start with your value in Hartree. For example: 5 Eh
- Multiply by the conversion factor: 5 x 2.0000003313
- The result is: 10.000002 Ry
Hartree and Rydberg Relationship
This calculation facilitates standardized conversion between recognized units of energy. Since 1 Hartree equals approximately 2 Rydbergs, the Hartree represents a larger unit interval than the Rydberg. Understanding the relationship between Hartree and Rydberg 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 Rydberg
The Rydberg (symbol: Ry) is a recognized unit in the Standard measurement framework, utilized within energy applications for precision and standardized data representation.
Common uses of Rydberg: energy calculations, engineering and science, education.
Frequently Asked Questions
- How many Rydbergs are in 1 Hartree?
- There are exactly 2.0000003313 Rydbergs in 1 Hartree. This means the conversion factor from Hartree to Rydberg is 2.0000003313.
- What is the formula to convert Hartree to Rydberg?
- The formula to convert Hartree to Rydberg is: Ry = Eh × 2.0000003313. For example, to convert 10 Hartrees to Rydbergs, you would multiply 10 by 2.0000003313.
- 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 Rydberg?
- The Rydberg (symbol: Ry) is a recognized unit in the Standard 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.
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Cite this page
UnitConvertLab. (2026). Hartree to Rydberg converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/hartree-to-rydberg