Energy Use Intensity (EUI) Calculator
The Energy Use Intensity Calculator divides a building's annual energy use by its floor area to give the EUI, a standard benchmark of building energy efficiency. Enter annual energy and floor area.
Formula
EUI = Annual Energy Use ÷ Floor Area
- Lower EUI means a more energy-efficient building.
- Typical office buildings fall in the range of roughly 100–250 kWh/m²/yr.
120,000 kWh over 1,000 m²
Inputs
- Annual Energy Use: 120000 kWh
- Floor Area: 1000 m²
120,000 ÷ 1,000 = 120 kWh/m²/yr.
Frequently asked questions
What is a good EUI?
Lower is better. Efficient buildings are often under 100 kWh/m²/yr, while energy-intensive ones exceed 200.