Converting electron-volts (eV) to kiloelectron-volts (keV) is a straightforward process essential in fields like physics and engineering. Since 1 keV equals 1,000 eV, you can convert eV to keV by dividing the energy value in eV by 1,000. For example, to convert 2,500 eV to keV: 2,500 eV ÷ 1,000 = 2.5 keV. Conversely, to convert keV to eV, multiply the energy value in keV by 1,000. This conversion is crucial when dealing with energy measurements at different scales, such as in particle physics or X-ray spectroscopy.