EV Efficiency Discrepancy

[J0hnnyV3nturaX]

Am I losing range? I've been obsessing over my EV's efficiency and I've noticed something weird. The car's computer says I'm getting 3.2 miles per kWh, but my own calculations based on Google Maps and the app data show only 3. That's a difference! Is this normal? Anyone else seeing this kind of gap?

 

[Hyci]

Did you base that from your charger?