Convert Electronvolt to Megakelvin
Convert electronvolts to megakelvins instantly. 1 eV = 0.0116045181 MK — use the live calculator, the exact formula, a reference-temperature table and worked examples. Also check the Megakelvin to Electronvolt converter for the reverse conversion.
Units explained
Electronvolt
As a temperature unit, one electronvolt (eV) is the temperature at which a particle's characteristic thermal energy kT equals one electronvolt — exactly 11,604.51812 kelvins under the 2019 SI definitions of e and k.
Comes from the plasma-physics and astrophysics habit of quoting temperatures directly as energies through the Boltzmann relation E = kT, which removes constant unit conversions from the equations of hot ionized matter.
Standard in plasma physics, fusion research, and high-energy astrophysics: the core plasma of a tokamak runs at tens of kiloelectronvolts, while the Sun's core is about 1.3 keV.
Grew out of 20th-century particle- and plasma-physics convention; its kelvin equivalent became an exact number when the 2019 SI revision fixed both the elementary charge and the Boltzmann constant.
Megakelvin
One megakelvin (MK) is one million kelvins (10⁶ K).
Formed with the SI prefix 'mega-' (from Greek 'megas', great) applied to the kelvin base unit.
Astrophysics and fusion science — the Sun's core burns at about 15.7 MK, and the solar corona runs at 1–3 MK.
The mega- prefix dates to the 1873 British Association system and entered the SI in 1960.
Electronvolt to Megakelvin conversion formula
The exact relationship between electronvolts and megakelvins:
To convert electronvolts to megakelvins, multiply the value in electronvolts by 0.01160451812. To reverse, multiply the value in megakelvins by 86.17333262.
Both units count upward from absolute zero, so 0 eV = 0 MK and the relationship is a pure ratio.
How to use this converter
Type a value into the calculator. The result in megakelvins updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Megakelvin to Electronvolt converter for the reverse direction.
Step-by-step: convert electronvolts to megakelvins
- Write down the temperature in electronvolts (eV).
- Multiply the value in electronvolts by 0.01160451812.
- The result is the same temperature expressed in megakelvins (MK).
- To reverse, multiply the value in megakelvins by 86.17333262 — or open the Megakelvin to Electronvolt converter.
Worked examples
Example 1 — Convert 1 eV to MK:
1 × 0.01160451812 = 0.0116045181 MK
Example 2 — Convert 100 eV to MK:
100 × 0.01160451812 = 1.1604518122 MK
Electronvolt to Megakelvin conversion table
Physically meaningful reference temperatures, from absolute zero to the surface of the Sun, converted from electronvolts to megakelvins:
| Electronvolt [eV] | Megakelvin [MK] | Reference point |
|---|---|---|
| 0 | 0 | Absolute zero |
| 0.0200913125 | 0.00023315 | Where Celsius and Fahrenheit coincide (−40°) |
| 0.0220062754 | 0.0002553722 | Zero Fahrenheit (0 °F) |
| 0.0235382458 | 0.00027315 | Water freezes (0 °C / 32 °F) |
| 0.0235391075 | 0.00027316 | Triple point of water |
| 0.0243999791 | 0.00028315 | Cool day (10 °C / 50 °F) |
| 0.0252617125 | 0.00029315 | Room temperature (20 °C / 68 °F) |
| 0.0256925791 | 0.00029815 | Standard laboratory temperature (25 °C) |
| 0.0261234458 | 0.00030315 | Hot day (30 °C / 86 °F) |
| 0.0267266591 | 0.00031015 | Human body temperature (37 °C / 98.6 °F) |
| 0.0269851791 | 0.00031315 | Heat-wave day (40 °C / 104 °F) |
| 0.0278469124 | 0.00032315 | Hot tap water (50 °C / 122 °F) |
| 0.0321555791 | 0.00037315 | Water boils (100 °C / 212 °F) |
| 0.0390494457 | 0.00045315 | Moderate baking oven (180 °C / 356 °F) |
| 0.4979095159 | 0.005778 | Surface of the Sun (≈5,505 °C) |
Frequently asked questions
How many megakelvins is 1 electronvolt?
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Sources & references
Conversion relationship (1 eV = 0.0116045181 MK) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- BIPM — International Temperature Scale of 1990 (ITS-90)
The internationally agreed practical temperature scale, defining fixed points (including the triple point of water at 273.16 K) and interpolation instruments used by national metrology institutes for thermometer calibration worldwide.
- CODATA Internationally Recommended Values of the Fundamental Physical Constants
Committee on Data of the International Science Council; authoritative source for the masses of fundamental particles (electron, proton, neutron) and the atomic mass constant.