Hong Life CalculatorsHow it works
Energy (kWh) = devices × average power (kW) × hours per day × days × PUE. PUE (power usage effectiveness) adds the data centre’s cooling and power-conversion overhead. CO₂ = energy × grid emission factor, which depends on how the electricity is generated where the servers run, so enter the factor for that grid or your supplier. Manufacturing the hardware (embodied emissions) and water use are not included.
Example grid emission factors (check the latest edition for your country)
| Grid | kg CO₂ per kWh | Source of the factor |
|---|---|---|
| United States average (2023 data) | 0.348 | US EPA eGRID2023, 767.209 lb CO₂/MWh |
| United Kingdom (2026 factors) | 0.14396 | UK Government GHG conversion factors 2026 (DESNZ), kg CO₂e |
⚠ Estimates for information only — not financial advice.
FAQ
Where do I find my country’s factor?
Use the latest factor published by your government’s energy or environment agency, or the figure on your electricity supplier’s fuel-mix disclosure. Market-based figures for green tariffs can be lower.
Does a cloud provider’s carbon dashboard replace this?
If you use cloud GPUs, the provider’s own emissions report is usually more accurate because it knows the real data centre and power mix. This page is for planning and for your own servers.
Checked 10 Nov 2026. PUE as defined in ISO/IEC 30134-2 (The Green Grid); example factors: US EPA eGRID2023 national output emission rate 767.209 lb CO₂/MWh (= 0.348 kg/kWh) and UK Government GHG conversion factors 2026 (DESNZ) for electricity, 0.14396 kg CO₂e/kWh.