How many miles can you run light without stopping and I'm talking about like actually running outside

I can run like maybe .5 Well actually can't physically run right now anyway due to an injury but before that running has never been my strength and I do have asthma too so that doesn't help Get last and it was about half a mile before I had to stop

Run like I do the elliptical I used to be able to run but I'm not sure in miles how long 10 K is but I used to be able to run 10 K in 54 minutes but I don't know what the equivalent is