How do I calculate an eye hospital's carbon footprint per surgery?
Add theatre and clinic electricity at 0.710 kg CO2 per kWh, generator diesel and sterilisation, then divide by surgeries. Single use kits, lenses and drugs are Scope 3 and can match or exceed the energy. Report outpatient visits separately from surgeries.
Records
- Theatre and sterilisation electricity.
- Diesel for backup power.
- Purchases of surgical kits, intraocular lenses and drapes.
Reusable versus single use
Compare per surgery: reusable instruments add sterilisation energy, single use kits add purchased goods and waste.
What Senseible does here
Senseible reads electricity bills (CEA grid factor 0.710 kg CO2 per kWh, CO2 Baseline Database version 21.0) and diesel, LPG and gas invoices (IPCC 2006 defaults) into a dated, fingerprinted Scope 1 and 2 record for each site. Intensity per unit uses the activity count you enter, and estimates are labelled as estimates.
Sources: CEA CO2 Baseline Database, GHG Protocol Corporate Value Chain (Scope 3) Standard
Last reviewed 2026-10-22.