The number of folds in a traditional katana can vary depending on various factors, including the swordsmith's technique, the desired result, and the specific requirements of the sword being forged. While there is no fixed or standardized number of folds for a traditional katana, it is common for the steel to be folded multiple times during the forging process.

In traditional Japanese swordsmithing, the steel is repeatedly heated, hammered, and folded over itself to remove impurities, homogenize the material, and create a fine-grained structure. Each fold doubles the number of layers in the steel, resulting in a layered or "grain-like" pattern known as hada.

The number of folds can vary from swordsmith to swordsmith, but it is not uncommon for a well-crafted katana to have several dozen folds or more. Some exceptional blades may have hundreds of folds, while others may have fewer folds depending on the desired aesthetic effect and the skill of the swordsmith.

It's important to note that while the folding process contributes to the overall quality and aesthetics of a katana, it is not the sole determinant of its performance or value. Other factors such as the choice of steel, heat treatment, geometry, and the skill and expertise of the swordsmith play significant roles in creating a well-crafted and functional katana.