Carbon Calculator User Guide

Standards Compliance: This tool follows ISO 14064-1 and GHG Protocol standards for corporate carbon accounting, ensuring that greenhouse gas quantification and reporting methods comply with international recognition.

Currency Note: The currency is Chinese Yuan (CNY). Scope 3 Category 1 emission factors use US EPA data (originally converted using USD/HKD exchange rate). When using, please refer to the current USD/CNY exchange rate to verify emission factor values yourself.

Calculation Scope

• Scope 1: Stationary combustion, mobile combustion, process emissions, fugitive emissions
• Scope 2: Purchased electricity (location-based & market-based), heat/steam/cooling
• Scope 3: Categories 1, 3, 4, 5, 9 (5 key categories relevant to manufacturing)

Required Inputs

Please fill in the basic information of the enterprise, including:

• Company Name: Used for report identification
• Reporting Year: The fiscal year for accounting
• Annual Revenue: Used to calculate carbon intensity indicators (Million CNY)

Direct greenhouse gas emissions from sources owned or controlled by the organization.

Stationary Combustion

Emissions from fuel combustion in fixed equipment (boilers, furnaces, generators, etc.).

Default emission factors are based on IPCC guidelines. When unit is GJ, NCV = 1 (direct heat input); for other units (such as liters, tonnes), the corresponding net calorific value (NCV) of the fuel must be entered.

Mobile Combustion

Emissions from fuel combustion in mobile equipment (company vehicles, forklifts, etc.).

The unit depends on the activity data type (fuel liters, kilometers driven, etc.), and the emission factor already includes the corresponding conversion.

Process Emissions

Emissions from industrial processes and chemical reactions (non-fuel combustion). Emission factors must be obtained from facility-specific data, industry guidelines, or regulatory sources.

Fugitive Emissions

Emissions from intentional or unintentional releases (refrigerant leaks, etc.).

GWP factors use IPCC Sixth Assessment Report (AR6) values. The table below lists GWP values for common refrigerants:

Indirect greenhouse gas emissions from purchased electricity, heat, steam, and cooling.

Purchased Electricity

Emissions from electricity purchased from the grid. This tool calculates using two methods:

• Location-based: Uses grid average emission factors
• Market-based: Uses contractual emission factors or supplier-specific emission factors, deducting valid green certificate coverage

It is recommended to periodically verify the latest grid emission factors and manually update values. The table below shows reference emission factors:

Green Certificates (Renewable Energy Certificates)

Renewable energy certificates purchased to demonstrate green electricity consumption can offset emissions in market-based calculations.

Supported certificate types: REC, GO (Guarantee of Origin), I-REC (International Renewable Energy Certificate), TIGR.

Purchased Heat, Steam and Cooling

Emissions from purchased thermal energy (district heating, steam, chilled water, etc.).

1 MWh = 3.6 GJ (automatically converted by the system). Emission factors should be obtained from your energy supplier or regional energy authority.

Indirect greenhouse gas emissions from the organization's value chain. This tool covers 5 categories most relevant to manufacturing enterprises.

Category 1: Purchased Goods and Services

Emissions from goods and services purchased by the organization, using the EEIO (Environmentally Extended Input-Output) spend-based method.

Use the NAICS industry search box (enter Chinese or English keywords) to find corresponding industry emission factors, click "Add to Table" to auto-fill.

Category 3: Fuel and Energy-Related Activities (T&D Losses)

Emissions from transmission and distribution losses of purchased electricity (not included in Scope 1 and 2).

This table is automatically calculated based on Scope 2 purchased electricity data, no manual entry required. Reference loss rate: approximately 3%.

Category 4: Upstream Transportation and Distribution

Emissions from transporting purchased goods to the organization.

Emission factors based on UK Government 2025 GHG Conversion Factors for Company Reporting:

Category 5: Waste Generated in Operations

Emissions from the disposal and treatment of waste generated in operations.

Category 6 and 7: Business Travel and Employee Commuting

Not Included: Business Travel (Category 6) and Employee Commuting (Category 7) are not included in this manufacturing-focused tool. For guidance on calculating these categories, consider using transportation emission factors and typical business travel/commuting data.

Category 9: Downstream Transportation and Distribution

Emissions from transporting products to end customers, calculated using the same method as Category 4 (weight × distance × emission factor).

Scope Summary

Total Carbon Footprint: Uses market-based Scope 2 emissions as the official total, as this reflects actual procurement choices and renewable energy investments.

• Location-based: Uses grid average factors, facilitating horizontal comparison
• Market-based: Reflects actual energy procurement contracts and green certificate usage

Carbon Intensity

Carbon Intensity = Total Emissions ÷ Annual Revenue (Million CNY), measured in tCO2e/Million CNY, used to measure carbon emission efficiency per unit of economic output.

Export Functions

• Export HTML: Generates a read-only HTML report file with filled data, can be saved/printed
• Export Excel: Generates a multi-worksheet Excel file with details and summaries for each scope, for further analysis

Global Warming Potential (GWP) Factors - IPCC AR6

Waste Treatment Emission Factors

Regional T&D Loss Rates

Transport Emission Factors

Data Source References