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    Energy Conversion

    Electron Volt to Hartree Converter

    Quick answer

    To convert Electron Volts to Hartrees, multiply by 0.0367493222 (or divide by 27.211386246). Therefore, 1 Electron Volt (eV) equals 0.03674932 Hartrees (Eh).

    Formula: Eh = eV × 0.0367493222. Worked example: 10 eV = 0.367493 Eh.

    Convert Electron Volt (eV) to Hartree (Eh) online with our free unit converter. In energy, 1 eV = 0.036749 Eh. Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.

    Worked example: converting Electron Volt to Hartree

    1. Step 1 — start with the formula. Eh = eV × 0.0367493222
    2. Step 2 — substitute your figure. 10 eV × 0.0367493222
    3. Step 3 — read the result. 10 eV = 0.367493 Eh
    4. Step 4 — check it in reverse. eV = Eh × 27.211386246 returns 10 eV, which matches the figure you started with.

    Energy Converter

    27 units available

    Decimals:
    0.036749

    1 eV = 0.036749 Eh

    Formula:

    Eh = eV × 0.0367493222

    With your value: 1 eV = 0.03674932 Eh

    How big is that?

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

    Your value1.00 eV
    Heartbeat (6.2e+18× your value)6.24e+18 eV
    AA battery charge (6.2e+22× your value)6.24e+22 eV
    Slice of bread (1.7e+24× your value)1.75e+24 eV
    Daily food intake (5.2e+25× your value)5.24e+25 eV
    Litre of petrol (2.1e+26× your value)2.13e+26 eV

    Other Electron Volt to Hartree conversions

    2 eV to Eh3 eV to Eh4 eV to Eh5 eV to Eh6 eV to Eh7 eV to Eh8 eV to Eh

    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

    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

    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.

    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

    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

    How to Convert Electron Volt to Hartree

    To convert from Electron Volt (eV) to Hartree (Eh), multiply the value by 0.0367493222.

    Formula: Eh = eV × 0.0367493222

    Reverse: eV = Eh × 27.211386246

    Step-by-Step Example

    1. Start with your value in Electron Volt. For example: 5 eV
    2. Multiply by the conversion factor: 5 x 0.0367493222
    3. The result is: 0.183747 Eh

    Electron Volt and Hartree Relationship

    This calculation facilitates standardized conversion between recognized units of energy. Since 1 Electron Volt represents a fraction of a Hartree (1 Hartree ≈ 27.2114 Electron Volts), the Hartree is the larger measurement interval. Understanding the relationship between Electron Volt and Hartree is essential for accurate calculations in physics, engineering, commerce, and daily applications.

    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.

    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.

    Frequently Asked Questions

    How many Hartrees are in 1 Electron Volt?
    There are exactly 0.0367493222 Hartrees in 1 Electron Volt. This means the conversion factor from Electron Volt to Hartree is 0.0367493222.
    What is the formula to convert Electron Volt to Hartree?
    The formula to convert Electron Volt to Hartree is: Eh = eV × 0.0367493222. For example, to convert 10 Electron Volts to Hartrees, you would multiply 10 by 0.0367493222.
    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 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 are the common uses of Electron Volt?
    The Electron Volt is commonly used in energy calculations, engineering and science, education.

    Related Energy Conversions

    Joule → HartreeKilojoule → HartreeMegajoule → HartreeGigajoule → HartreeMillijoule → HartreeCalorie (th) → HartreeCalorie (IT) → HartreeKilocalorie → HartreeBTU (th) → Hartree

    Cite this page

    UnitConvertLab. (2026). Electron Volt to Hartree converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/electron_volt-to-hartree