200–300 travel entries a year. One person. No sustainability team. CarbonTrack turns that data problem into a permanent, formula-visible audit trail — without the two-week spreadsheet scramble.
Takes 45 seconds. Origin, destination, transport mode, date. Google Places Autocomplete ensures clean location data. No free-text. No ambiguity.
Employees log at source — immediately after the trip — so data is accurate rather than reconstructed weeks later from a credit card statement.
CarbonTrack applies the correct distance methodology for the transport mode. No manual lookups. No Google Maps estimates being used where Haversine is required.
For flights: Haversine Great Circle — the methodology explicitly required by DEFRA for air travel emissions. For road and rail: Google Maps Distance Matrix for actual route distance.
CarbonTrack holds the complete DEFRA 2025 GHG Conversion Factor table. The correct factor for the transport mode and travel class is retrieved and applied automatically.
Not an estimate. Not a rounded figure. The exact published DEFRA factor to six decimal places — the level of precision required for a defensible statutory filing.
The complete calculation is stored against the trip entry. Distance. Factor. Passengers. Result. Every variable. Every step. Immutable — it cannot be edited after saving.
This is the formula trail. This is what makes CarbonTrack audit-ready rather than just a calculator.
At any point — year-end, tender deadline, auditor request — generate your SECR report or PPN 06/21 Carbon Reduction Plan. One click.
The PDF includes your total tCO₂e baseline, scope breakdown, DEFRA badge, Net Zero commitment, Director signature block, and a complete formula trail appendix showing every single trip calculation.
CarbonTrack holds all 15 DEFRA 2025 transport emission factors. No manual lookups. No out-of-date spreadsheet references. The factor used for every entry is recorded permanently alongside the calculation.
| Transport Mode | Travel Class | kgCO₂e/km | Distance Method |
|---|---|---|---|
| Flight — Domestic | Economy | 0.255133 | Haversine |
| Flight — Short Haul | Economy | 0.153180 | Haversine |
| Flight — Short Haul | Business | 0.229770 | Haversine |
| Flight — Long Haul | Economy | 0.147613 | Haversine |
| Flight — Long Haul | Business | 0.429234 | Haversine |
| Flight — Long Haul | First | 0.590454 | Haversine |
| Train — National Rail | Standard | 0.035390 | Distance Matrix |
| Train — International | Standard | 0.004130 | Distance Matrix |
| Car — Petrol | — | 0.168330 | Distance Matrix |
| Car — Diesel | — | 0.163050 | Distance Matrix |
| Car — Hybrid | — | 0.106850 | Distance Matrix |
| Car — Electric | — | 0.052690 | Distance Matrix |
| Taxi | — | 0.149780 | Distance Matrix |
| Ferry — Foot passenger | — | 0.018820 | Haversine |
| Ferry — Car passenger | — | 0.128860 | Haversine |
Book a 15-minute demo. We'll run a real trip through the system and show you exactly what the audit trail and report output look like.