Calculation Results
The summary appears here after you run the calculation.
Emissions by Activity
Interactive Plotly GraphDetailed Results Table
| Activity | Category | Quantity | Adjusted Activity | CO2e Factor | Emissions | Share |
|---|
Scenario Inputs
Build one scenario with as many activity rows as needed.
Example Data Table
This sample shows how mixed activity rows can be entered for a single reporting scenario.
| Activity | Category | Quantity | Unit | CO2 Factor | CH4 Factor | N2O Factor | Utilization % | Oxidation % | Capture % |
|---|---|---|---|---|---|---|---|---|---|
| Main Grid Supply | Purchased Electricity | 18,000.00 | kWh | 0.420 | 0.008 | 0.004 | 100 | 100 | 0 |
| Backup Generator | Stationary Fuel | 2,400.00 | liters | 2.680 | 0.120 | 0.080 | 95 | 100 | 0 |
| Site Fleet | Mobile Combustion | 1,300.00 | liters | 2.680 | 0.090 | 0.070 | 100 | 100 | 0 |
| Cement Clinker Step | Process Emissions | 16.00 | tons | 520.000 | 0.000 | 0.000 | 100 | 100 | 0 |
Formula Used
Adjusted Activity = Quantity × Utilization Factor × Oxidation Factor × (1 − Capture Efficiency)
CO2e Factor = CO2 Factor + (CH4 Factor × GWP_CH4 ÷ 1000) + (N2O Factor × GWP_N2O ÷ 1000)
Emissions (kg CO2e) = Adjusted Activity × CO2e Factor
Total Emissions = Sum of all activity emissions
Emissions Intensity = Total Emissions ÷ Production Output
CH4 and N2O factors are entered in grams per activity unit, then converted to kilograms inside the calculation.
How to Use This Calculator
- Enter scenario-level details such as baseline emissions, production output, output unit, and selected global warming potentials.
- Add one row per emission source. You may choose a preset or enter fully custom factors.
- For each row, enter quantity, activity unit, CO2 factor, CH4 factor, N2O factor, utilization percentage, oxidation percentage, and capture percentage.
- Click Estimate Emissions to calculate total emissions, intensity, activity shares, uncertainty range, and the largest source.
- Review the results table and Plotly chart, then export the scenario using the CSV or PDF buttons.
Frequently Asked Questions
What does this emissions estimation calculator measure?
It estimates carbon dioxide equivalent emissions from multiple engineering activities. You can model stationary fuel, electricity, fleet fuel, travel, process releases, and material use in one scenario.
Can I use custom emission factors?
Yes. Every activity row accepts manual CO2, CH4, and N2O factors. Presets are included only to speed up setup and should be verified against your local inventory method.
Why are CH4 and N2O entered separately?
Some methods require separate non-CO2 gases. The calculator converts CH4 and N2O into CO2e using the selected global warming potential values, then adds everything together.
What do utilization, oxidation, and capture change?
Utilization scales the active portion of the quantity. Oxidation adjusts how much of the fuel is oxidized. Capture reduces released emissions when control equipment removes a share.
How is emissions intensity calculated?
Intensity equals total emissions divided by total production or output. This is useful for comparing plants, batches, or reporting periods even when total activity changes.
Can this calculator replace a formal inventory?
No. It is an engineering estimation tool for screening, planning, and benchmarking. Formal reporting may require location-specific factors, scope rules, uncertainty analysis, and audit documentation.
What units should I use?
Use the unit that matches your emission factor. If your factor is kilograms per liter, enter liters. If your factor is kilograms per kilowatt-hour, enter kilowatt-hours.
What does the baseline comparison show?
The baseline field compares the current estimate against a reference case. A positive difference means the new case emits less than baseline, while a negative difference means more.