You misue the metric system and I want you to correct your user interface language.
Example Check out this post on Strava from The Strava Club. https://strava.app.link/pMyMogGuKCb
In above:
k = 1000, m = metre. Don't break the metric system. You should write 1 km, 5 km, 20 km. Lower case k is not short for kilometre.