Times when you may have problems are with pastries and cakes. But even with things like gelatin leaves - these vary in their strength. Sorry cookie1, as before, there will be some trial and error.
Most of the spoon measurements are close, cups also, but pints in US are 16 fl oz and UK 20 fl oz.
There are US - metric conversion charts on the internet if you are using a US recipe.
My recipes are metric, but they can vary from week to week in amounts - and salt especially is a matter of personal taste - start small.