It’s not much to look at, but the Science Made Simple site is loaded with usefulness. Most of the time you can pull that weight or length conversion out of your head, but sometimes you just can’t remember how much of something is in another with the conversion.
I found the Science Made Simple site after trying to uncover the answer to a question just like that.
You can see they’ve got the Metric conversion information you’re looking for but they’ve got much more as well.
Visit them and find out and remember all that stuff you forgot from grade school and high school homework.