Convert Electronvolts to Therms
Convert Electronvolts (eV) to Therms (thm) instantly and accurately.
Conversion Formula
thm = eV × 1.518570443e-27
About Electronvolts
An electronvolt (eV) is the kinetic energy gained by one electron accelerated through 1 volt - exactly 1.602176634 × 10⁻¹⁹ J (fixed by the 2019 SI revision). It is the natural energy unit of atomic and particle physics: visible light photons carry 1.7-3.1 eV; hydrogen ionisation requires 13.6 eV; X-ray photons span 100 eV-100 keV; protons at the LHC reach 6.5 TeV. Rest masses use eV/c²: electron 0.511 MeV, proton 938.3 MeV, Higgs boson 125 GeV. Nuclear binding energy peaks at ~8 MeV/nucleon for iron-56. 1 eV = 1.602176634 × 10⁻¹⁹ J.
About Therms
A therm is the US natural gas billing unit equal to exactly 100,000 BTU = 105,505,585.262 J ≈ 105.5 MJ. One CCF of average US pipeline gas contains ~1.02 therms. The EIA publishes residential gas prices in $/therm; spot prices at Henry Hub are in $/MMBTU (1 MMBTU = 10 therms). US households average 500-700 therms/year for space heating, water heating, and cooking. A 15 kW domestic boiler running 2 hours delivers ~1 therm of useful heat. 1 therm = 100,000 BTU = 105.506 MJ = 29.307 kWh = 25,200 kcal.
Quick Reference Table
| Electronvolts (eV) | Therms (thm) |
|---|---|
| 1 eV | 1.519 × 10-27 thm |
| 2 eV | 3.037 × 10-27 thm |
| 5 eV | 7.593 × 10-27 thm |
| 10 eV | 1.519 × 10-26 thm |
| 25 eV | 3.796 × 10-26 thm |
| 50 eV | 7.593 × 10-26 thm |
| 100 eV | 1.519 × 10-25 thm |