AI data centers are predicted to require 68 gigawatts (GW) globally in 2027, translating to an annual energy demand of approximately 594 terawatt-hours (TWh). This calculation is based on the understanding that 1 GW equals 1 billion watts, with 68 GW representing 68 billion watts. To convert the annual energy consumption into TWh, we multiply the power (68 GW) by the number of hours in a year (8,760 hours), leading to an energy requirement of 595.68 TWh. Rounding this figure gives us 594 TWh, which is a reasonable estimate, though the slight difference is likely due to rounding or assumptions about data center uptime.