Sexing your pacman frog can be difficult, especially in juvenile frogs.
In young frogs it is more of a guessing game to figure out the gender of your frogs. Some say that you can get a good idea if the frog is female it will have a more triangular shaped nose, while males have a flatter face.
In adult frogs it is easier to tell the sex of your frog. Males have darker color chests, while females tend to stay more white. Male pacman frogs tend to croak more than females do.
The best way to tell if you have a male frog is they will have a dark bump on their hands.