Cache Size Calculator

Summary

Enter your cache parameters — number of sets, associativity, and block size — to instantly compute total cache size and address bit breakdowns.

How it works

1. Select a cache mapping type: direct-mapped, set-associative, or fully-associative.
2. Enter the number of cache sets (S) — must be a power of 2.
3. Enter the associativity (E), the number of lines (ways) per set.
4. Enter the block size (B) in bytes — must be a power of 2.
5. Enter the total address space (number of address bits).
6. The calculator shows total cache size, data capacity, and the tag/index/offset bit breakdown.

Use cases

• Verify cache sizing homework for computer architecture courses.
• Understand how set associativity affects address bit partitioning.
• Design cache parameters for embedded system memory constraints.
• Cross-check textbook examples on cache organization.
• Compare direct-mapped vs. fully-associative trade-offs quickly.

Frequently Asked Questions