MPG Calculations

[Bjsurprise]

I have a honda clarity hybrid and previously owned a hybrid Hyundai Sonata. Both well undercalculated the mileage I was getting. For instance, on my Honda, the mpg indicator tells me i'm getting 47mpg (when i run mostly on gas) but when i check the mileage based on the amount of gas i put in the tank, and the miles i drive, i would get closer to 40mpg. Is this common?

 

[mustermutti]

For the Clarity it does seem to be common. Based on my experience and other posts here, Clarity trip computer seems to inflate the actual mpg number by about 10..12%.

There's a dedicated Clarity sub-forum by the way that seems much more active, looks like you posted in the parent forum (dedicated to Honda in general).