I am an American cyclist. I train my TT and Road Races (I know what’s that? :-)) with imperial measurements. As I prepare for 2023 racing I have been thinking I should go with metric. I will be in Italy in June for a long event as well.
How long did it take for other folks who use imperial measurement in their daily life to adjust to metric? Did you switch to gauge distance over time in events to match the signs on the road?
I’m also in UK. My GPS has been on km since 2010 when I started riding audax events. Also noticed my car sat nav was in km the other day, haven’t driven on the Continent since I drove to the Dolomites in 2018 pre pandemic. Shows how much the units make a different (not).
Like others I’ll convert between miles and km with rough numbers
10km = 6 miles
10 miles = 16 km
24km = 15 miles
But most often I don’t bother converting as I’m rarely focused on distance during a ride.
Also in UK. I use km exclusively for cycling and running (infact all outdoor activities - for hiking etc our OS maps are in km anyway). Driving I use miles and mph just because of speed limits and road signage, between that and ordering beer it’s the only imperial I regularly use.
I convert really easily in my head - it’s 5:8 km:miles, and 10 miles is obviously 16km (16.1 to be precise) so 20 mph is ~32kph etc, which doesn’t take a lot of thought really. I rarely need to convert on the bike though as I usually either have a route on my Garmin (so road signs for distances are pretty irrelevant) or I already know where I am going…
Road signs can be pretty inconsistent, you might see a sign that says “[Town] 8 miles” twice, nearly a mile apart… So they are not much use for micro-navigation. Also the distance by the signed route is regularly not the same as the route I am taking, as the signs are obviously intended for cars so they will take you down roads that I would rather avoid. So the fact road signs are in miles doesn’t really matter on the bike (and the approximate conversion isn’t hard anyway).
I use ml and grams for cooking and so on… But I can tell you off the top of my head that a pound is 454g and a UK fluid ounce is just over 28ml for example… And there’s 568ml in a UK pint, 284 in a half etc etc…
I am pretty good at converting from stone and pounds to kg as I track my weight in kg (watts per kilo!) but my wife keeps the bathroom scales in stone and pounds!
I’m in the UK and I think I mostly use imperial (miles, mph, feet and inches, stones and lbs) simply as thats what I am used to. Except temperature where I use Celcius as thats what I am used to there. For anything technical though I use metric as the maths is easier.