Convert Electronvolt to Fahrenheit
Convert electronvolts to degrees fahrenheit instantly. °F = (eV × 20888.13262) − 459.67 — use the live calculator, the exact formula, a reference-temperature table and worked examples. Also check the Fahrenheit 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.
Fahrenheit
The degree Fahrenheit (°F) sets the freezing point of water at 32 °F and the boiling point at 212 °F, dividing the interval into 180 equal degrees. One degree Fahrenheit is exactly 5/9 the size of a kelvin, and °F = °C × 9/5 + 32 exactly.
Created by German-born physicist Daniel Gabriel Fahrenheit, inventor of the reliable mercury-in-glass thermometer. His zero point was the temperature of an ice-and-salt brine mixture, and his original upper fixed point sat near human body temperature.
The official everyday scale of the United States and a handful of other countries. In India, clinical thermometers and fever readings are still very commonly quoted in Fahrenheit (a '102-degree fever'), which keeps °F to °C conversion a daily need.
Introduced by Daniel Gabriel Fahrenheit in 1724 in Amsterdam, building directly on Ole Rømer's earlier scale, which Fahrenheit had studied during a 1708 visit to Copenhagen.
Electronvolt to Fahrenheit conversion formula
The exact relationship between electronvolts and degrees fahrenheit:
To convert electronvolts to degrees fahrenheit, multiply the value by 20888.13262, then subtract 459.67. To reverse, add 459.67 to the value, then multiply by 4.787407e-5.
Reference anchors: water freezes at 0.0235382458 eV = 32 °F and boils at 0.0321555791 eV = 212 °F (at standard atmospheric pressure).
How to use this converter
Type a value into the calculator. The result in degrees fahrenheit updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Fahrenheit to Electronvolt converter for the reverse direction.
Step-by-step: convert electronvolts to degrees fahrenheit
- Write down the temperature in electronvolts (eV).
- Multiply the value by 20888.13262, then subtract 459.67.
- The result is the same temperature expressed in degrees fahrenheit (°F).
- To reverse, add 459.67 to the value, then multiply by 4.787407e-5 — or open the Fahrenheit to Electronvolt converter.
Worked examples
Example 1 — Convert 1 eV to °F:
(1 × 20888.13262) − 459.67 = 20428.4626187901 °F
Example 2 — Convert 100 eV to °F:
(100 × 20888.13262) − 459.67 = 2088353.5918790149 °F
Electronvolt to Fahrenheit conversion table
Physically meaningful reference temperatures, from absolute zero to the surface of the Sun, converted from electronvolts to degrees fahrenheit:
| Electronvolt [eV] | Fahrenheit [°F] | Reference point |
|---|---|---|
| 0 | -459.67 | Absolute zero |
| 0.0200913125 | -40 | Where Celsius and Fahrenheit coincide (−40°) |
| 0.0220062754 | 0 | Zero Fahrenheit (0 °F) |
| 0.0235382458 | 32 | Water freezes (0 °C / 32 °F) |
| 0.0235391075 | 32.018 | Triple point of water |
| 0.0243999791 | 50 | Cool day (10 °C / 50 °F) |
| 0.0252617125 | 68 | Room temperature (20 °C / 68 °F) |
| 0.0256925791 | 77 | Standard laboratory temperature (25 °C) |
| 0.0261234458 | 86 | Hot day (30 °C / 86 °F) |
| 0.0267266591 | 98.6 | Human body temperature (37 °C / 98.6 °F) |
| 0.0269851791 | 104 | Heat-wave day (40 °C / 104 °F) |
| 0.0278469124 | 122 | Hot tap water (50 °C / 122 °F) |
| 0.0321555791 | 212 | Water boils (100 °C / 212 °F) |
| 0.0390494457 | 356 | Moderate baking oven (180 °C / 356 °F) |
| 0.4979095159 | 9940.73 | Surface of the Sun (≈5,505 °C) |
Frequently asked questions
What is 1 eV in °F?
How do I convert electronvolts to degrees fahrenheit?
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At what temperature do the Electronvolt and Fahrenheit scales read the same number?
Can a temperature be below absolute zero?
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Sources & references
Conversion relationship (°F = (eV × 20888.13262) − 459.67) 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.