# How many CPU hours is one FlexCredit comparable to? | Date | Category | |------------|-------------| | 2023-12-03 10:53:25 | About Tidy3D | One FlexCredit is equivalent to about 50 hours of CPU core time when using the traditional FDTD method. That's the equivalent of running a computer processor core for two days straight, just for one FlexCredit! If you have 60 FlexCredits, it's like having a 4-core CPU (which is a pretty powerful computer) running non-stop, 24 hours a day, for a full month.