I made myself a t-shirt using 37 mpb. I also had a discussion w/ my wife & daughter and they said something similar: they didn't want to bike 20-30 miles just to eat a burrito. It hadn't occurred to me that's how it would be perceived since I came at it from a math and efficiency perspective.

So the sticker for me would probably be in the 30-45 mpb range (i.e. 37 mpb), which is similar to the mpg for an above average efficiency car (Honda civic mpg is ~36mpg combined).

I average around 35 calories burned per mile cycled. My watch estimates calories so I calculated the cal/mile ranges for rides across various altitudes and elevation gain/strenuousness from 22 to 44 calories per mile, so my efficiency varies from 25-50 mpb (for that 1115 cal burrito).

Historical First Name Popularity Visualizer
engaging-data.com/baby-name-vi...

Global birth map: Where are people being born in the world, showing the real-time rate of births.
engaging-data.com/global-birth...

There are even more interactive visualizations and tools on the website. I am an occasional teacher/lecturer, so if you do end up using them for a classroom/educational setting, I'd love to hear about it and how you use them.
engaging-data.com

Digits math game - probably best for 5th through High School math
engaging-data.com/digitsgame/

Visualizing the orbital path of the International Space Station
engaging-data.com/orbit-intern...

Visualizing extreme wealth in context of other large quantities
engaging-data.com/how-rich-is-...

Splitting up the US into equally populated divisions
engaging-data.com/splitting-us...