Ayam Percik is genuinely one of the better lauk options if you are watching your calories, and that surprises a lot of people. You get 360 calories and 32g of protein in a single piece, which is a pretty solid ratio. The main drivers here are the percik sauce, made with santan, palm sugar, and spices, and the chicken thigh skin. Without those two things this dish would be quite lean. With them, you get that rich sticky glaze that makes Ayam Percik worth travelling to Kelantan for. Honest caveat though: the numbers on this page are a genuine ballpark estimate. Hard nutritional data for traditional kampung-style Ayam Percik is basically nonexistent, and every mak cik's recipe is different. Treat 360 as your working number, not gospel.
What actually changes the maths is which piece you order and how sauce-heavy the stall is. A drumstick runs about 290 calories versus 360 for a thigh, so if you are at a buffet or a festival stall and want two pieces, go for the two kaki option instead of one peha and save yourself 70 calories. The half chicken serving at about 700 calories is really a sharing portion, bro, not a solo meal. At home, if you swap full-fat santan for the light version in the percik sauce, you can probably shave 30 to 40 calories off the sauce portion without destroying the flavour. The protein is the star here. 32g from one piece is excellent for a lauk, easily on par with ayam bakar, and it keeps you full enough to not raid the kuih tray afterward.