Original invoices and labels are not sent to the calculation API. The server receives the quantity, chosen factor or your own factor values, and technical connection data. AI receives only the question you submit.
Free · 5/33 uses left this month
Measure.Prove.Reduce.
Carbon accounting for companies. Every number traces back to a formula and a source.
Total tCO₂e
0.00
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Documents
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Carbon · Softwinx.com / Free
Your invoices stay in your browser.
Original invoices and labels are not sent to the calculation API. The server receives the quantity, chosen factor or your own factor values, and technical connection data. AI receives only the question you submit.
Questions about carbon accounting and the listed factors. Do not enter personal data or invoice contents. Your question is sent to IBM watsonx.ai only when you submit it.
Export locally or explicitly copy a summary. No automatic synchronization or sharing.
What this version actually does
Original invoices and labels are not sent to the calculation API. The server receives the quantity, chosen factor or your own factor values, and technical connection data. AI receives only the question you submit. UBA: Germany, reference year 2024, list 2.1. UK DESNZ/DEFRA: reporting year 2026, revised flat file v1.2. Upstream emissions are excluded from the selected direct factors. The UBA electricity factor includes about 5% transmission losses as specified by its source. Own factors remain unverified.
Activity ledger
| Scope | Category / description | Quantity | Factor | kg CO₂e | Source | Actions |
|---|
Audit trail
Carbon accounting with traceable sources
Enter activity quantities for the selected factor. The result is quantity × kg CO₂e per unit. Source year, region and boundary are shown for every preset. Keep country and reporting year consistent; these factors do not form a universal global dataset.
Official factor selection
UBA: Germany, reference year 2024, list 2.1. UK DESNZ/DEFRA: reporting year 2026, revised flat file v1.2. Upstream emissions are excluded from the selected direct factors. The UBA electricity factor includes about 5% transmission losses as specified by its source. Own factors remain unverified.
Sources and methods
DE electricity mix 2024 (UBA)
0.371584501 kg CO₂e/kWh · Scope 2
DE natural gas, gross CV 2024
0.183252931 kg CO₂e/kWh · Scope 1
DE fossil diesel, mobile 2024
2.676934405 kg CO₂e/l · Scope 1
UK average car, unknown fuel 2026
0.16591 kg CO₂e/km · Scope 3
UK short-haul economy, no RF 2026
0.07435 kg CO₂e/pkm · Scope 3
UK average diesel HGV, no cooling 2026
0.10356 kg CO₂e/tkm · Scope 3
Common questions
What is free?
Allowance reached. Free accounts share 33 uses per UTC calendar month across calculations, document previews and AI. Guests also have 5 uses per day. Verify your permanent email with a one-time code. 33 combined uses per calendar month. Accounts on the same network share an additional monthly IP allowance.
Are invoices uploaded to the hosting server?
The hosted calculator keeps invoice previews in the browser. Automatic Docling extraction needs the separate local Python app.
Can these factors be used in every country?
No. The selected German and UK factors have specific reference years and boundaries. Choose a matching source or define your own factor.