In particle physics, energy measurements often utilize units like gigaelectronvolts (GeV) and electronvolts (eV). Understanding the conversion between these units is crucial for accurate data interpretation. One GeV equals 1,000,000,000 eV (10^9 eV). To convert GeV to eV, multiply the energy value in GeV by 10^9. For instance, 2 GeV is equivalent to 2 × 10^9 eV, resulting in 2,000,000,000 eV. Conversely, to convert eV to GeV, divide the energy value in eV by 10^9. This straightforward conversion is essential for analyzing particle interactions and energies in high-energy physics experiments.