Convert petawatt hour to gigaelectronvolt

The watt (W) is a unit of power, the rate at which energy is used or produced. The watt-hour (Wh) is a unit of energy, one watt sustained for one hour, and is what this page converts: a 2 kW heater running for 3 hours uses 6 kWh, and an electricity bill counts kWh. 'Watts per hour' (W/h) would be a rate of change of power, is rarely needed, and is not the same thing as a watt-hour.

The electronvolt is the energy an electron gains crossing one volt, 1.602 × 10⁻¹⁹ J, and is the natural unit of the very small. Chemical bonds and visible light are a few eV, X-rays tens of keV, nuclear gamma rays MeV, and the Large Hadron Collider brings protons to 6.8 TeV each. Through E = mc² it also serves as a mass unit: an electron is 0.511 MeV, a proton 938 MeV, and the Higgs boson 125 GeV.