Calculator For Opel 1.0 — fast mileage calculator for Opel Vectra/Astra clusters 
A tiny Windows helper that converts an Original value into the required New value bytes for Opel dashboards. Works with popular instrument clusters used on Vectra and Astra (VDO / TRW). Load your EEPROM dump, enter the values, press Calc, then Save File to write back with your programmer.
Key features
Typical use cases
Quick start
Compatibility
Tested on Windows 10 LTSC (2019). Also runs on Windows 7 / 8 / 10 / 11 (x86/x64).
Minimum system requirements
Best practices
Legal notice
Instrument cluster recalibration may be regulated in your region. Use this tool only for legitimate service tasks (module repair/replacement and restoration of accurate data) and keep proper documentation.
Disclaimer
Information above is derived from the provided screenshot and general public knowledge for educational/archival purposes. Any files, if referenced, are hosted by third parties; our forum does not host or distribute software and is not responsible for external content.
A tiny Windows helper that converts an Original value into the required New value bytes for Opel dashboards. Works with popular instrument clusters used on Vectra and Astra (VDO / TRW). Load your EEPROM dump, enter the values, press Calc, then Save File to write back with your programmer.
Key features
- Models / types: Vectra, Astra VDO, Astra TRW (select at right).
- Simple workflow: Open File → enter Original → New → Calc → Save File.
- On-screen keypad for quick numeric input at the bench.
- “Show Power” helper to preview calculation details for the selected cluster type.
- Lightweight & portable — ideal as a bench-side utility next to your EEPROM programmer.
Typical use cases
- Cluster replacement after repair (restoring previously documented mileage)
- EEPROM data recovery when dumps are inconsistent or corrupted
- Preparing a used cluster for the same vehicle with correct calibration
Quick start
- Read the dash EEPROM with your programmer and back up the dump.
- Choose the correct target: Vectra, Astra VDO or Astra TRW.
- Click Open File, type the Original value and your New value, then press Calc.
- Click Save File, write the file back to the cluster and verify on the bench/vehicle.
Compatibility
Tested on Windows 10 LTSC (2019). Also runs on Windows 7 / 8 / 10 / 11 (x86/x64).
Minimum system requirements
- OS: Windows 7 or newer (32/64-bit)
- CPU: Dual-core 2.0 GHz+
- RAM: 2 GB (4 GB recommended)
- Storage: under 50 MB free
- Extras: EEPROM programmer & stable 12 V bench supply
Best practices
- Always keep an untouched backup of the original dump.
- Verify cluster type selection before calculating/saving.
- Validate the result with ignition on at the bench before installation.
Legal notice
Instrument cluster recalibration may be regulated in your region. Use this tool only for legitimate service tasks (module repair/replacement and restoration of accurate data) and keep proper documentation.
Disclaimer
Information above is derived from the provided screenshot and general public knowledge for educational/archival purposes. Any files, if referenced, are hosted by third parties; our forum does not host or distribute software and is not responsible for external content.
