Life Cycle Assessment Calculator

Estimate whole-building life-cycle carbon emissions (kgCO2e) across product, construction, use, and end-of-life stages per ISO 14040.

Floor Area (sq ft)

Study Period (years)

Embodied Carbon (kgCO2e/ft²)

Construction Carbon (% of A1-A3)

Operational EUI (kBtu/ft²/yr)

Grid Carbon (kgCO2e/kWh)

Maintenance/Replacement (% of A1-A3)

End of Life (% of A1-A3)

Tab to move between fields

Total Life-Cycle Carbon (kgCO2e)

1,999,999

Total Embodied Carbon (kgCO2e)241,500

Operational Carbon (kgCO2e)1,758,499

Embodied Share (%)12.1%

Operational Share (%)87.9%

Carbon Intensity (kgCO2e/ft²/yr)6.67

Total Life-Cycle Energy (MJ)17,758,495

How to Use This Calculator

Enter Floor Area in sq ft and Study Period in years (LEED uses 60 years).
Enter Embodied Carbon Rate in kgCO2e/ft² and Construction Carbon as a percentage of A1–A3.
Enter Annual Operational EUI in kBtu/ft²/yr and Grid Carbon Intensity in kgCO2e/kWh.
Enter Maintenance/Replacement and End-of-Life carbon percentages.
Review Total Life-Cycle Carbon, Embodied vs Operational Carbon split, and Carbon Intensity per ft² per year.

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