Estimate carbon footprint across operations, energy, and travel. Compare scenarios with renewables and efficiency actions. Download clean outputs for audits, reporting, and targets today.
Each line item is calculated with a consistent approach:
| Scope | Activity | Quantity | Unit | EF (kg/unit) | tCO2e |
|---|---|---|---|---|---|
| 1 | Natural gas | 150,000.00 | kWh | 0.1830 | 27.4500 |
| 2 | Electricity (grid) | 900,000.00 | kWh | 0.5000 | 450.0000 |
| 3 | Flights | 120,000.00 | passenger-km | 0.1500 | 18.0000 |
Choosing the right boundary keeps your inventory consistent. Use operational control when you manage daily decisions, financial control when ownership drives consolidation, or equity share for proportional reporting. The period field anchors comparisons across years and quarters. Record consolidation choices alongside facility lists and exclusions. Clear definitions reduce double counting across subsidiaries and joint ventures and help auditors trace why each source belongs in Scope 1, 2, or 3.
Activity data is the foundation of credible results. Start with utility bills for electricity, meter readings for fuels, and vehicle logs for mileage and liters. For travel, capture passenger kilometres, hotel nights, and reimbursement totals. In Scope 3, prioritize categories with spend or influence, then refine methods toward activity based measures where possible. Enter quantities with consistent units for each site and keep supporting documents, assumptions, and rules together.
Emission factors translate activity into emissions. Use factors that match geography, technology, and accounting method, and record their source, version, and units. Grid electricity factors vary by region and contract type, while fuels depend on carbon content. The calculator lets you edit factors and choose a GWP set for CO2e consistency. Review units so kilograms per unit align with your activity inputs and update when datasets change over time.
Results are most useful when you look beyond the total. Compare Scope shares to identify where decarbonization levers sit, then review the top line items to find hotspots. Apply reduction percentages to model efficiency programs, fuel switching, or travel policies, and use renewable share to test procurement strategies. Intensity metrics normalize emissions by employees and revenue, supporting benchmarking across growth scenarios and business units. Track trends quarterly for confidence.
Use exported outputs to strengthen governance. The CSV report supports reconciliation, category mapping, and pivot analysis, while the PDF snapshot is useful for reviews and approvals. Store calculation inputs with evidence, and note any estimates or exclusions. When setting targets, separate structural changes from data quality upgrades, and update baselines only with documented reasons. Over time, expand Scope 3 coverage and improve supplier specific data to increase comparability materially.
Totals are shown as tonnes of CO2 equivalent for Scope 1, Scope 2, Scope 3, and the grand total. A detailed line table shows each activity, factor, reduction setting, and resulting tCO2e.
Use factors that match your geography, fuel type, and accounting method. Prefer authoritative datasets, record their version and units, and ensure the factor is expressed in kilograms per activity unit used in your inputs.
Renewable share reduces the grid electricity quantity before applying the grid factor. The renewable portion is displayed separately with a zero factor for scenario planning. For formal reporting, align this treatment with your market based rules and evidence.
Yes. Use Custom line items to add any activity with its own scope, unit, quantity, factor, and reduction. This is useful for refrigerants, waste, shipping, cloud usage, or supplier specific data.
Intensity normalizes emissions so you can compare performance over time. The tool reports tCO2e per employee and tCO2e per one million revenue, which helps benchmark growth scenarios or compare business units.
It supports planning and internal inventories. For assurance, verify factors, document boundaries, keep evidence for activity data, and follow the standard required by your disclosure framework. Validate results with independent checks before publishing.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.