Please turn on JavaScript.
Media requires JavaScript to play.
Aberdeen are just three points behind third-placed Motherwell but Mark McGhee's side have played two games less.
The Lanarkshire side visit Ibrox on Wednesday before Aberdeen travel to Fir Park next weekend.
"I think Motherwell just have to win one of their remaining games and third place is theirs," added Calderwood.
"But we've shown a big improvement since our poor show against Queen of the South in the Scottish Cup.
"We had eight players missing today and, when we've got everybody fit, we are a match for anyone."