Kali Linux requires:
A minimum of 50GB hard disk space for installation depending on the version, Version 2020.2 requires at least 50GB.
A minimum of 6GB RAM for i386 and AMD64 architectures.
A bootable CD-DVD drive or a USB stick.
A minimum of an Intel Core i5 or an AMD E1 processor for good performance.
The recommended hardware specification for a smooth experience are:
50 GB of hard disk space, SSD preferred
At least 6GB of RAM