Milli-electron volts to joules converter on this page calculates how many joules are in 'X' milli-electron volts (where 'X' is the number of milli-electron volts to convert to joules). In order to convert a value from milli-electron volts to joules (from meV to J) just type the number of meV to be converted to J and then click on the 'convert' button.