Which is right, zero degrees celiuis or zero degree celsius?And what about 0.5 metres and 0.5 metre?
Which is right, zero degrees celiuis or zero degree celsius?And what about 0.5 metres and 0.5 metre?Why is it? "one degree celsius" doesn't need "-s", but why zero need the "-s"?

Question

Which is right, zero degrees celiuis or zero degree celsius?And what about  0.5 metres and 0.5 metre?
Which is right, zero degrees celiuis or zero degree celsius?And what about  0.5 metres and 0.5 metre?Why is it? "one degree celsius" doesn't need "-s", but  why zero need the "-s"?

Answer

Zero degrees celsius and 0.5 metres. You could also say.'half a metre' (or meter).