2.2 lbs to kg. 39 inches to the meter. 3.79 liters to 4 quarts. 1.6 km to the mile. * 9/5 and + 32 for C to F. I think those are correct? I think I was mad

2.2 lbs to kg. 39 inches to the meter. 3.79 liters to 4 quarts. 1.6 km to the mile. * 9/5 and + 32 for C to F. I think those are correct? I think I was made to memorize those at some point, but of note, I am also an immigrant to the US from a wacky metric system nation.