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    Energy Conversion

    2 Rydberg to Electron Volt

    Quick answer

    2 Rydberg (Ry) equals

    27.211382 eV

    To convert 2 Rydbergs to Electron Volts, multiply by 13.6056908692. Therefore, 2 Rydberg (Ry) equals 27.211382 Electron Volt (eV).

    Formula: eV = Ry × 13.6056908692. Calculation: 2 × 13.6056908692 = 27.211382 eV.

    Convert Rydberg (Ry) to Electron Volt (eV) online with our free unit converter. In energy, 1 Ry = 13.605691 eV. Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.

    Worked example: converting Rydberg to Electron Volt

    1. Step 1 — start with the formula. eV = Ry × 13.6056908692
    2. Step 2 — substitute your figure. 2 Ry × 13.6056908692
    3. Step 3 — read the result. 2 Ry = 27.211382 eV
    4. Step 4 — check it in reverse. Ry = eV × 0.0734986565 returns 2 Ry, which matches the figure you started with.

    Energy Converter

    27 units available

    Decimals:
    27.211382

    2 Ry = 27.211382 eV

    Formula:

    eV = Ry × 13.6056908692

    With your value: 2 Ry = 27.21138174 eV

    How big is that?

    Everyday references on a logarithmic scale, all expressed in rydberg so you can sanity-check the result.

    Your value2.00 Ry
    Heartbeat (2.3e+17× your value)4.59e+17 Ry
    AA battery charge (2.3e+21× your value)4.59e+21 Ry
    Slice of bread (6.4e+22× your value)1.28e+23 Ry
    Daily food intake (1.9e+24× your value)3.85e+24 Ry
    Litre of petrol (7.8e+24× your value)1.57e+25 Ry

    Other Rydberg to Electron Volt conversions

    1 Ry to eV3 Ry to eV4 Ry to eV5 Ry to eV6 Ry to eV7 Ry to eV8 Ry to eVFull Rydberg to Electron Volt converter

    Rydberg to Electron Volt Conversion Table

    Rydberg (Ry)Electron Volt (eV)
    0.56.802845
    113.605691
    227.211382
    568.028454
    10136.056909
    15204.085363
    20272.113817
    25340.142272
    50680.284543
    1001,360.569087
    2503,401.422717
    5006,802.845435
    100013,605.690869

    Electron Volt to Rydberg Conversion Table

    Electron Volt (eV)Rydberg (Ry)
    0.50.036749
    10.073499
    20.146997
    50.367493
    100.734987
    151.10248
    201.469973
    251.837466
    503.674933
    1007.349866
    25018.374664
    50036.749328
    100073.498657

    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.

    Rydberg (Ry)

    Energy

    Exact conversion

    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

    Electron Volt (eV)

    Energy

    Exact conversion

    1 eV = 1.602 176 634 × 10⁻¹⁹ J exactly, since the elementary charge is now fixed.

    Source: CODATA Internationally Recommended Values of the Fundamental Physical Constants (2022 adjustment)

    CODATA / NIST · Reviewed 2026-07-01

    How to Convert Rydberg to Electron Volt

    To convert from Rydberg (Ry) to Electron Volt (eV), multiply the value by 13.6056908692.

    Formula: eV = Ry × 13.6056908692

    Reverse: Ry = eV × 0.0734986565

    Step-by-Step Example

    1. Start with your value in Rydberg. For example: 5 Ry
    2. Multiply by the conversion factor: 5 x 13.6056908692
    3. The result is: 68.028454 eV

    Rydberg and Electron Volt Relationship

    This calculation facilitates standardized conversion between recognized units of energy. Since 1 Rydberg equals approximately 13.6057 Electron Volts, the Rydberg represents a larger unit interval than the Electron Volt. Understanding the relationship between Rydberg and Electron Volt is essential for accurate calculations in physics, engineering, commerce, and daily applications.

    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.

    About Electron Volt

    The Electron Volt (symbol: eV) is a recognized unit in the Standard measurement framework, utilized within energy applications for precision and standardized data representation.

    Common uses of Electron Volt: energy calculations, engineering and science, education.

    Frequently Asked Questions

    What is 2 Rydberg in Electron Volt?
    2 Rydberg equals 27.211382 Electron Volt.
    How many Electron Volts are in 1 Rydberg?
    There are exactly 13.6056908692 Electron Volts in 1 Rydberg. This means the conversion factor from Rydberg to Electron Volt is 13.6056908692.
    What is the formula to convert Rydberg to Electron Volt?
    The formula to convert Rydberg to Electron Volt is: eV = Ry × 13.6056908692. For example, to convert 10 Rydbergs to Electron Volts, you would multiply 10 by 13.6056908692.
    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 is a Electron Volt?
    The Electron Volt (symbol: eV) 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 Rydberg?
    The Rydberg is commonly used in energy calculations, engineering and science, education.

    Related Energy Conversions

    Joule → Electron VoltKilojoule → Electron VoltMegajoule → Electron VoltGigajoule → Electron VoltMillijoule → Electron VoltCalorie (th) → Electron VoltCalorie (IT) → Electron VoltKilocalorie → Electron VoltBTU (th) → Electron Volt

    Cite this page

    UnitConvertLab. (2026). 2 Rydberg to Electron Volt. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/2-rydberg-to-electron_volt