# Do airplanes have odometers?

**URL:** <https://boards.straightdope.com/t/do-airplanes-have-odometers/604790>\
**Category:** Factual Questions\
**Created:** [December 2, 2011, 3:26am UTC](https://boards.straightdope.com/t/do-airplanes-have-odometers/604790 "2011-12-02T03:26:28Z")\
**Posts on this page:** 1\
**Page:** 2

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**Author:** ![Pixel\_Dent](https://avatars.discourse-cdn.com/v4/letter/p/bc8723/32.png) [@Pixel\_Dent](https://boards.straightdope.com/u/Pixel_Dent)\
**Post date:** [December 7, 2011, 4:15pm UTC](https://boards.straightdope.com/t/do-airplanes-have-odometers/604790/21 "2011-12-07T16:15:58Z")

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> [@Placid\_Liver](#):
>
> So then how is fuel efficiency calculated?

My plane has a gizmo that measures fuel flow. That gizmo is connected to the GPS so it knows how fast the plane is going and how far to the destination I have punched in. It spits out gallons/hour, gallons/nautical mile, gallons to destination (this is estimated of course).

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