complete.tools

Calories to Electronvolts Converter

Convert calories to electronvolts (eV). Scientific energy unit conversion for physics and chemistry applications.

What this tool does

Convert calories to electronvolts (eV). Scientific energy unit conversion for physics and chemistry applications. Type an amount in calories (thermochemical), choose the units, and the tool converts it to electronvolts. It offers 5 energy units and also shows the same amount in the others.

Inputs

  • Value: A number.
  • From: Choose one: Calorie (thermochemical), Joule, Electronvolt, Kiloelectronvolt, Megaelectronvolt. Starts as Calorie (thermochemical).
  • To: Choose one of the same 5 units as "From". Starts as Electronvolt.

How to use

  1. Enter the amount you want to convert.
  2. Choose the unit to convert from and the unit to convert to.
  3. Read the result: the converted amount and the same amount in the other units. It appears once every required field has a valid value.

Worked examples

Conversions from calories (thermochemical) to electronvolts:

  • 1 cal (th) ≈ 2.61144739675 × 10¹⁹ eV
  • 5 cal (th) ≈ 1.30572369838 × 10²⁰ eV
  • 10 cal (th) ≈ 2.61144739675 × 10²⁰ eV
  • 50 cal (th) ≈ 1.30572369838 × 10²¹ eV
  • 100 cal (th) ≈ 2.61144739675 × 10²¹ eV

Multiply the number of calories (thermochemical) by about 2.61144739675 × 10¹⁹ to get electronvolts. The factor follows from exact definitions. It has more digits than fit here, so it is shown rounded.

Sources: Calorie (thermochemical): NIST SP 811 (2008), Appendix B.8. Electronvolt: SI Brochure, 9th edition (2019).

Limitations

  • Converts units of energy only. It does not work out energy from power, time, voltage or charge.

FAQs

Q: How many electronvolts are in one calorie (thermochemical)?
A: One calorie (thermochemical) is about 2.6114474 × 10¹⁹ electronvolts. Change the value to convert any amount; the other units are listed below the result.
Q: Which definition of the units does this page use?
A: Calories here are thermochemical calories (1 cal = 4.184 J exactly), the definition commonly used in chemistry and nutrition. The International Table calorie (4.1868 J) is slightly larger.
Q: Can I convert from electronvolts to calories (thermochemical)?
A: Yes. Choose electronvolt in the From box and calorie (thermochemical) in the To box. One electronvolt is about 3.8292941 × 10⁻²⁰ calories (thermochemical).

Explore Similar Tools

Explore more tools like this one: