v3.26.1
Class K [Member] N-1A Cover
May 31, 2025
Prospectus [Line Items]  
Document Type 497
Amendment Flag false
Registrant Name BlackRock Capital Appreciation Fund, Inc.
Entity Central Index Key 0000887509
Entity Investment Company Type N-1A
Document Period End Date May 31, 2025
Prospectus Date Sep. 26, 2025