Honestly, kuih jala is one of the more diet-friendly traditional kuihs out there, bro. Two pieces with curry sits at roughly 240 calories, which is not bad at all for a proper snack. The crepes themselves are thin and airy, only about 100 calories for the pair. The real calories come from the curry gravy, around 110 calories for 80g of coconut milk-based curry, and the small bits of chicken tucked in. Worth flagging: these numbers are a ballpark estimate, because detailed lab data for kuih jala specifically is basically nonexistent. We cross-referenced the crepe batter (egg, flour, coconut milk, turmeric) and standard chicken curry macros to get here. Treat it as a reasonable guide, not gospel.
What actually swings the calories is how much gravy you pour over. Go light on the curry and you are closer to 180-190 calories. Go heavy with a generous ladle, maybe add a second dip, and you are pushing past 300 easily. Switching to sweet kuah (coconut milk dipping sauce) instead of curry drops you to about 200 calories since the sweet sauce is thinner and has less fat overall. Going from 2 pieces to 3 pieces adds roughly 50 calories from the extra crepe plus a bit more gravy. If you are at a kenduri and someone piles on three pieces with a big scoop of curry, you are probably looking at 320 calories. Still not a disaster, but it adds up if you eat four rounds because the food is just sitting there.