Convert Therms to Electronvolts
1 therm (thm) equals 6.583568738 × 10²⁶ electronvolts (eV).
1 thm = 6.583568738e26 eV
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk therm to electronvolt converter to paste a column from Excel.
How to Convert Therm to Electronvolt
- 1 thm = 6.583568738 × 10²⁶ eV
- 1 eV = 1.518933028 × 10⁻²⁷ thm
- Example: convert 15 thm to eV: 15 thm = 15 × 6.583568738 × 10²⁶ eV = 9.875353107 × 10²⁷ eV
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
eV = thm × 6.583568737778 × 10²⁶
Derivation from SI units:
- 1 thm (US) = 1.054804 × 10⁸ J (NIST SP 811)
- 1 eV = e × 1 V = 1.602176634 × 10⁻¹⁹ J (exact since 2019)
- 1 thm = 105480400 J ÷ 1.602176634 × 10⁻¹⁹ J per eV = 6.583568737778 × 10²⁶ eV
Both units are defined exactly, so the factor is exact. Therm definition: therm; Electronvolt definition: electronvolt.
Worked examples
- A reading of 20 thm converts to 1.316713748 × 10²⁸ eV.
20 thm × 6.583568738 × 10²⁶ = 1.316713748 × 10²⁸ eV - A value of 100 thm is 6.583568738 × 10²⁸ eV.
100 thm × 6.583568738 × 10²⁶ = 6.583568738 × 10²⁸ eV
Therm to Electronvolt conversion table
| Therms (thm) | Electronvolts (eV) |
|---|---|
| 1 thm | 6.583568738 × 10²⁶ eV |
| 5 thm | 3.291784369 × 10²⁷ eV |
| 10 thm | 6.583568738 × 10²⁷ eV |
| 20 thm | 1.316713748 × 10²⁸ eV |
| 50 thm | 3.291784369 × 10²⁸ eV |
| 75 thm | 4.937676553 × 10²⁸ eV |
| 100 thm | 6.583568738 × 10²⁸ eV |
| 500 thm | 3.291784369 × 10²⁹ eV |
| 1000 thm | 6.583568738 × 10²⁹ eV |
Where it's used
Therms are used for US and UK natural-gas bills, while electronvolts appear in atomic and particle physics. Both measure energy, work and heat, so the conversion is a fixed factor.
Therm to other energy units
| Conversion | 1 thm equals |
|---|---|
| therm to joule | 105480400 J |
| therm to kilojoule | 105480.4 kJ |
| therm to megajoule | 105.4804 MJ |
| therm to calorie | 25210420.65 cal |
| therm to kilocalorie | 25210.42065 kcal |
| therm to watt-hour | 29300.11111 Wh |
| therm to kilowatt-hour | 29.30011111 kWh |
| therm to BTU | 99976.12898 BTU |
| therm to electronvolt | 6.583568738 × 10²⁶ eV |
| therm to foot-pound | 77798350.53 ft·lbf |
| therm to erg | 1.054804 × 10¹⁵ erg |
Frequently asked questions
How many electronvolts are in 1 therm?
1 thm = 6.583568738 × 10²⁶ eV.
How do I convert therms to electronvolts?
Multiply the value in thm by 6.583568738 × 10²⁶. For example, 15 thm × 6.583568738 × 10²⁶ = 9.875353107 × 10²⁷ eV.
Is the thm to eV 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
- 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.)".
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 8 and the fixed elementary charge e.
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 Therms to Electronvolts. Retrieved October 17, 2026, from https://scientificconverters.com/energy/therms-to-electronvolts/
IEEE
Scientific Converters, "Convert Therms to Electronvolts," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/energy/therms-to-electronvolts/