Energy Audit Calculator
Estimate your home energy CO₂ emissions, cost, and efficiency rating from electricity, gas, and heating usage.
How to Use the Energy Audit Calculator
- Enter monthly electricity in kWh.
- Enter gas consumption in m³.
- Enter heating and cooling kWh, then click Calculate.
Use Cases
- •Home energy auditing.
- •Carbon footprint reduction planning.
- •Building energy performance assessment.
Formula
Formula: CO₂(kg) = electricity×0.233 + gas×2.0 + heating×0.2 + cooling×0.233. Rating based on total kWh equivalent.
Frequently Asked Questions
What CO₂ factors are used?
Electricity: 0.233 kg/kWh (EU average), natural gas: 2.0 kg/m³, heating: 0.2 kg/kWh, cooling: 0.233 kg/kWh.
What energy rating is A?
Rating A corresponds to total energy use below 200 kWh equivalent per month. This represents highly efficient modern buildings.
How can I improve my energy rating?
Insulation, double glazing, efficient appliances, LED lighting, smart thermostats, and renewable energy sources all improve ratings.