Use the formula given to calculate energy in joules with the calculator.
E= 1.60217653E-19 x 5.34 eV = 8.5556226702E-19 J.
Navigate to the NASA Energy Converter (see resources).
Select "J" as the units using the drop-down listbox in the column "Energy."
Select "eV" as the units using the drop-down listbox in the column "electron volt."
Enter the energy value in eV in the field in the column "electron volt."
In our example, enter the value 5.34.
Note: always do Steps 2 and 3 before entering energy.
Click on the data field in the "energy" column. Energy in J should appear there.
In our example it is 8.5556E-19 J.
Note: the result is rounded to the 4th digit after the decimal point which very reasonable.
Click "Reset," and repeat Steps 3 to 6 to convert another energy value.