How do I convert electronvolts back to joules?

Use the reverse converter: 1 electronvolt equals 1.60218e-19 J.

Is this converter accurate?

Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.

To convert joules to electronvolts, multiply the value by 6.24150907e+18.

eV = J × 6.24150907e+18

20 J × 6.24150907e+18 = 1.2483e+20 eV

Joule (J): The SI unit of energy, one newton-metre, named after James Prescott Joule.
Electronvolt (eV): Used in particle and atomic physics. Exactly 1.602176634×10⁻¹⁹ joules.

How do I convert joules to electronvolts?: To convert joules to electronvolts, multiply the value by 6.24150907e+18.
How many electronvolts are in 1 joule?: 1 joule equals 6.24151e+18 eV.
How many electronvolts are in 10 joules?: 10 J equals 6.24151e+19 eV.
How do I convert electronvolts back to joules?: Use the reverse converter: 1 electronvolt equals 1.60218e-19 J.
Is this converter accurate?: Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.