There's no single answer. To accurately convert 55 college units, you need to know the specific institution's unit-to-semester-hour equivalency. You should:
* Check the institution's website: Look for information in their registrar's office or academic catalog. They often have a conversion chart or explanation of their credit system.
* Contact the registrar's office directly: If you can't find the information online, contact the registrar's office of the institution that awarded the 55 units. They can provide the correct conversion.
Without knowing the institution, any conversion would be a guess and potentially inaccurate.