Centre is the British English spelling. Center is American.

There's no differences between them."Center" used in US english and it is the var of "centre".

Thank you for your explain with details, Brenda. I got it.

Hi Jane Here is how I use the two words "Center" would be a synonym for "middle". (He stood in the center of the circle.) "Centre" would be the word used to describe a gathering place. (The crowd gathered at the new Arts and Innovation Centre.) Brenda