First, it is crucial to clarify terminology. "BP Tools" is a common shorthand for , the industry-standard platform for web security testing. The "Cryptographic Calculator" is not a standalone executable you find on a random download site. Instead, it is a specialized extension (or BApp) within the Burp Suite ecosystem, often bundled with the Burp Extender or specific crypto-analyzer modules.
The BP-Tools suite is lightweight and runs efficiently on most modern hardware: download bp tools cryptographic calculator
If you just need a local cryptographic calculator (not inside Burp): First, it is crucial to clarify terminology