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    Energy Conversion

    20 Hartree to Electron Volt

    Quick answer

    20 Hartree (Eh) equals

    544.227725 eV

    To convert 20 Hartrees to Electron Volts, multiply by 27.211386246. Therefore, 20 Hartree (Eh) equals 544.227725 Electron Volt (eV).

    Formula: eV = Eh × 27.211386246. Calculation: 20 × 27.211386246 = 544.227725 eV.

    Convert Hartree (Eh) to Electron Volt (eV) online with our free unit converter. In energy, 1 Eh = 27.211386 eV. Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.

    Worked example: converting Hartree to Electron Volt

    1. Step 1 — start with the formula. eV = Eh × 27.211386246
    2. Step 2 — substitute your figure. 20 Eh × 27.211386246
    3. Step 3 — read the result. 20 Eh = 544.227725 eV
    4. Step 4 — check it in reverse. Eh = eV × 0.0367493222 returns 20 Eh, which matches the figure you started with.

    Energy Converter

    27 units available

    Decimals:
    544.227725

    20 Eh = 544.227725 eV

    Formula:

    eV = Eh × 27.211386246

    With your value: 20 Eh = 544.22772492 eV

    How big is that?

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

    Your value20.0 Eh
    Heartbeat (1.1e+16× your value)2.29e+17 Eh
    AA battery charge (1.1e+20× your value)2.29e+21 Eh
    Slice of bread (3.2e+21× your value)6.42e+22 Eh
    Daily food intake (9.6e+22× your value)1.93e+24 Eh
    Litre of petrol (3.9e+23× your value)7.84e+24 Eh

    Other Hartree to Electron Volt conversions

    14 Eh to eV15 Eh to eV16 Eh to eV18 Eh to eV21 Eh to eV24 Eh to eV25 Eh to eVFull Hartree to Electron Volt converter

    Hartree to Electron Volt Conversion Table

    Hartree (Eh)Electron Volt (eV)
    0.513.605693
    127.211386
    254.422772
    5136.056931
    10272.113862
    15408.170794
    20544.227725
    25680.284656
    501,360.569312
    1002,721.138625
    2506,802.846561
    50013,605.693123
    100027,211.386246

    Electron Volt to Hartree Conversion Table

    Electron Volt (eV)Hartree (Eh)
    0.50.018375
    10.036749
    20.073499
    50.183747
    100.367493
    150.55124
    200.734986
    250.918733
    501.837466
    1003.674932
    2509.187331
    50018.374661
    100036.749322

    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

    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 Hartree to Electron Volt

    To convert from Hartree (Eh) to Electron Volt (eV), multiply the value by 27.211386246.

    Formula: eV = Eh × 27.211386246

    Reverse: Eh = eV × 0.0367493222

    Step-by-Step Example

    1. Start with your value in Hartree. For example: 5 Eh
    2. Multiply by the conversion factor: 5 x 27.211386246
    3. The result is: 136.056931 eV

    Hartree and Electron Volt Relationship

    This calculation facilitates standardized conversion between recognized units of energy. Since 1 Hartree equals approximately 27.2114 Electron Volts, the Hartree represents a larger unit interval than the Electron Volt. Understanding the relationship between Hartree and Electron Volt 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 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 20 Hartree in Electron Volt?
    20 Hartree equals 544.227725 Electron Volt.
    How many Electron Volts are in 1 Hartree?
    There are exactly 27.211386246 Electron Volts in 1 Hartree. This means the conversion factor from Hartree to Electron Volt is 27.211386246.
    What is the formula to convert Hartree to Electron Volt?
    The formula to convert Hartree to Electron Volt is: eV = Eh × 27.211386246. For example, to convert 10 Hartrees to Electron Volts, you would multiply 10 by 27.211386246.
    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 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 Hartree?
    The Hartree 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). 20 Hartree to Electron Volt. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/20-hartree-to-electron_volt