## How to Calculate Plastic Carbon Footprint: Step-by-Step Guide for Manufacturers
Calculating your plastic product’s carbon footprint is essential for regulatory compliance, customer reporting, and sustainability improvement. Follow this step-by-step guide.
### Step 1: Define Boundaries
**Scope 1 (Direct)**:
– Fuel combustion in facilities
– Company vehicles
– Process emissions
**Scope 2 (Indirect – Energy)**:
– Purchased electricity
– Purchased heat/steam
– Cooling
**Scope 3 (Value Chain)**:
– Upstream: Raw materials, transportation
– Downstream: Product use, end-of-life
### Step 2: Collect Data
**Required Information**:
– Material quantities (kg)
– Energy consumption (kWh)
– Transportation distances (km)
– Waste quantities (kg)
**Data Sources**:
– Purchase records
– Utility bills
– Production logs
– Shipping documents
### Step 3: Apply Emission Factors
**Common Factors**:
– Virgin PET: 2.8-3.5 kg CO2e/kg
– PCR PET: 0.8-1.5 kg CO2e/kg
– Electricity (US grid): 0.4 kg CO2e/kWh
– Diesel transport: 0.06 kg CO2e/tkm
### Step 4: Calculate and Report
**Formula**:
“`
Total Emissions = Σ (Activity Data × Emission Factor)
“`
**Reporting**:
– Total kg CO2e per product
– Per kg of product
– Per functional unit
– Reduction vs. baseline
—
**Keywords**: carbon footprint calculation, plastic emissions, Scope 3, manufacturers guide