You cannot determine the correct amount without consulting your vehicle's service manual. The manual will specify the correct amount of refrigerant needed. Trying to guess can lead to overcharging or undercharging, both of which can damage the AC system.
Instead of guessing, you should:
* Find your vehicle's service manual: This is the best source of information. You can often find PDFs online or purchase a physical copy from a parts store or online retailer.
* Consult a qualified AC technician: A professional will have the proper tools and knowledge to properly diagnose and service your AC system, including determining the correct refrigerant charge. They will also be able to identify any leaks or other problems that might exist.
Attempting to charge the system yourself without the proper knowledge and equipment could lead to costly repairs.
