There are 88 dishes ranked on this page. The lightest is Satay at 50 kcal per 1 stick (chicken), the heaviest is Ngoh Hiang at 805 kcal per 1 mixed platter with sweet sauce, and the average lands around 367 calories a serving. 36 of them come in under 300 calories, and 12 are 600 or more.
That spread is the whole point. Two dishes off the same menu can be 755 calories apart, which is more than most people's entire daily deficit. Knowing which is which costs you nothing and changes the outcome.