How long is a year on Mars compared to earth?

If you are speaking of one orbit around the sun, about 2 earth years. If you are using Earth's calendar, one year is one year. (note it's rotation on it's axis is a little more than one Earth day - 24.6 hours)

on mars there is only a little time difference if compared to the earth if on earth 7:00AM than on mars it will be 7:10AM!!