Free server power calculator to estimate rack power draw, daily and monthly kWh, energy cost, PUE impact, and cooling load for data centers and server rooms. Total physical servers or nodes drawing power. Use measured or nameplate × utilization (e. In the Annual Energy Outlook 2026 (AEO2026), our long-term outlook, we project electricity consumed by data center servers will increase across the commercial building stock, increasing more in standalone data centers than in all other data center rooms combined. By 2050, server consumption alone. In its simplest form, a data center is a physical facility that houses and runs large computer systems. data center annual energy use in 2023 (not accounting for cryptocurrency) was approximately 176 terawatt-hours (TWh), approximately 4. 5% of worldwide electricity demand, and is expected to double to 945 TWh by 2030.