Yes.. it will fill the mold, although in the past I had a few issues with that regarding overfilling the mold.
There is a place to design the size of the soap recipe based on the interior mold dimensions. That's what I did, using millimeters for better accuracy. Then use grams for the weights of the recipe ingredients.
Works out every time up to the brim with fresh made soap!
Try it, you just may like it!