Electronvolts (eV) to BTU (IT) Converter
Enter a value to instantly convert between energy units.
1 Electronvolt = 1.5186e-22 BTU (IT)
Key Formulas
Kilocalorie → Kilojoule
kJ = kcal × 4.184Kilojoule → Kilocalorie
kcal = kJ × 0.239006Kilowatt-Hour → Joule
J = kWh × 3600000Joule → Kilowatt-Hour
kWh = J × 2.77778e-7Formula
BTU = eV × 1.518570e-22One electronvolt equals 1.52 × 10⁻²² BTU. eV is the atomic/particle physics unit; BTU is the imperial thermal unit. This conversion is rarely needed but useful when comparing atomic bond energies (in eV) with heating/cooling equipment (in BTU) — for example, thermal energy in semiconductors or plasma physics.
Source: NIST SP 811, Table B.8
Frequently Asked Questions
Real-World Examples
A high-energy particle has 10²⁰ eV — equivalent to 0.0152 BTU or about 16 joules — energy scales in fundamental physics.
100000000000000000000 eV = 0.0152 BTU
An ultra-relativistic cosmic ray carries 10²² eV — 1.52 BTU — enormous in particle physics, minimal in thermal engineering.
1e+22 eV = 1.52 BTU
A high-energy X-ray photon carries 10¹⁰ eV — equivalent to 1.52 × 10⁻¹² BTU, essentially zero thermal contribution despite being significant in particle physics and medical imaging applications.
10000000000 eV = 1.52e-12 BTU
A theoretical super-particle collision releases 10²³ eV — 15.2 BTU — still small in thermal terms but massive by particle standards.
1e+23 eV = 15.2 BTU