Convert Electronvolts to Therms
1 electronvolt (eV) equals 1.518933028 × 10⁻²⁷ therms (thm).
1 eV = 1.518933028e-27 thm
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk electronvolt to therm converter to paste a column from Excel.
How to Convert Electronvolt to Therm
- 1 eV = 1.518933028 × 10⁻²⁷ thm
- 1 thm = 6.583568738 × 10²⁶ eV
- Example: convert 15 eV to thm: 15 eV = 15 × 1.518933028 × 10⁻²⁷ thm = 2.278399542 × 10⁻²⁶ thm
Reference conditions. thm: US therm, 100 000 BTU (59 °F), 105.4804 MJ as given by NIST SP 811. The EC therm is 105.506 MJ.
Formula
thm = eV × 1.518933028316 × 10⁻²⁷
or thm = eV ÷ 6.583568737778 × 10²⁶
Derivation from SI units:
- 1 eV = e × 1 V = 1.602176634 × 10⁻¹⁹ J (exact since 2019)
- 1 thm (US) = 1.054804 × 10⁸ J (NIST SP 811)
- 1 eV = 1.602176634 × 10⁻¹⁹ J ÷ 105480400 J per thm = 1.518933028316 × 10⁻²⁷ thm
Both units are defined exactly, so the factor is exact. Electronvolt definition: electronvolt; Therm definition: therm.
Worked examples
- A reading of 1.5 eV converts to 2.278399542 × 10⁻²⁷ thm.
1.5 eV × 1.518933028 × 10⁻²⁷ = 2.278399542 × 10⁻²⁷ thm - A value of 13.6 eV is 2.065748919 × 10⁻²⁶ thm.
13.6 eV × 1.518933028 × 10⁻²⁷ = 2.065748919 × 10⁻²⁶ thm
Electronvolt to Therm conversion table
| Electronvolts (eV) | Therms (thm) |
|---|---|
| 0.025 eV | 3.797332571 × 10⁻²⁹ thm |
| 1 eV | 1.518933028 × 10⁻²⁷ thm |
| 1.12 eV | 1.701204992 × 10⁻²⁷ thm |
| 1.5 eV | 2.278399542 × 10⁻²⁷ thm |
| 2 eV | 3.037866057 × 10⁻²⁷ thm |
| 3 eV | 4.556799085 × 10⁻²⁷ thm |
| 10 eV | 1.518933028 × 10⁻²⁶ thm |
| 13.6 eV | 2.065748919 × 10⁻²⁶ thm |
| 100 eV | 1.518933028 × 10⁻²⁵ thm |
| 1000 eV | 1.518933028 × 10⁻²⁴ thm |
| 1000000 eV | 1.518933028 × 10⁻²¹ thm |
Where it's used
Electronvolts are used for atomic and particle physics, while therms appear in US and UK natural-gas bills. Both measure energy, work and heat, so the conversion is a fixed factor.
Electronvolt to other energy units
| Conversion | 1 eV equals |
|---|---|
| electronvolt to joule | 1.602176634 × 10⁻¹⁹ J |
| electronvolt to kilojoule | 1.602176634 × 10⁻²² kJ |
| electronvolt to megajoule | 1.602176634 × 10⁻²⁵ MJ |
| electronvolt to calorie | 3.829294058 × 10⁻²⁰ cal |
| electronvolt to kilocalorie | 3.829294058 × 10⁻²³ kcal |
| electronvolt to watt-hour | 4.45049065 × 10⁻²³ Wh |
| electronvolt to kilowatt-hour | 4.45049065 × 10⁻²⁶ kWh |
| electronvolt to BTU | 1.518570443 × 10⁻²² BTU |
| electronvolt to therm | 1.518933028 × 10⁻²⁷ thm |
| electronvolt to foot-pound | 1.181704842 × 10⁻¹⁹ ft·lbf |
| electronvolt to erg | 1.602176634 × 10⁻¹² erg |
Frequently asked questions
How many therms are in 1 electronvolt?
1 eV = 1.518933028 × 10⁻²⁷ thm.
How do I convert electronvolts to therms?
Multiply the value in eV by 1.518933028 × 10⁻²⁷, or divide it by 6.583568738 × 10²⁶. For example, 15 eV × 1.518933028 × 10⁻²⁷ = 2.278399542 × 10⁻²⁶ thm.
Is the eV to thm conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 8 and the fixed elementary charge e.
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "therm (U.S.)".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Electronvolts to Therms. Retrieved October 17, 2026, from https://scientificconverters.com/energy/electronvolts-to-therms/
IEEE
Scientific Converters, "Convert Electronvolts to Therms," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/energy/electronvolts-to-therms/