Product Carbon Emission Footprint Calculator

1. Define the product unit
Decide what one result represents, such as one item, one kilogram of product, or another functional unit, and keep every input on that basis.

2. Enter production emissions
Add the materials and manufacturing emissions calculated for the defined unit.

3. Enter distribution and use emissions
Enter the combined emissions you are including for logistics and product use.

4. Enter end-of-life emissions
Add disposal, recycling, or other end-of-life emissions included in your chosen boundary.

5. Review the total and shares
Use the component shares to identify which life-cycle stage dominates the entered footprint.

Formula

Product footprint = Production emissions + Distribution/use emissions + End-of-life emissions Stage share (%) = Stage emissions ÷ Product footprint × 100

All components must use the same CO2e unit, system boundary, and functional unit. The calculator does not generate life-cycle inventory factors.

What the result means

For this product definition, materials and production are the largest modeled stage at roughly 59.52% of the total footprint.

Product footprint totals depend on the functional unit, system boundary, data quality, and life-cycle method used.

Given

• Materials & production: 12.5 kgCO2e
• Distribution & use: 7.2 kgCO2e
• End-of-life: 1.3 kgCO2e

Calculation
Total = 12.5 + 7.2 + 1.3 = 21.0 kgCO2e
Production share = 12.5 ÷ 21.0 × 100 ≈ 59.52%

Result
21.000 kgCO2e per defined product unit

For this product definition, materials and production are the largest modeled stage at roughly 59.52% of the total footprint.