v3.25.4
Cover - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Mar. 13, 2026
Jun. 30, 2025
Document Type 10-K    
Amendment Flag false    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2025    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2025    
Current Fiscal Year End Date --12-31    
Entity File Number 001-41097    
Entity Registrant Name CARDIO DIAGNOSTICS HOLDINGS, INC.    
Entity Central Index Key 0001870144    
Entity Tax Identification Number 87-0925574    
Entity Incorporation, State or Country Code DE    
Entity Address, Address Line One 311 West Superior Street    
Entity Address, Address Line Two  Suite 444    
Entity Address, City or Town Chicago    
Entity Address, State or Province IL    
Entity Address, Postal Zip Code 60654    
City Area Code 855    
Local Phone Number 226-9991    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company true    
Elected Not To Use the Extended Transition Period false    
Entity Shell Company false    
Entity Public Float     $ 5.8
Entity Common Stock, Shares Outstanding   2,959,469  
Documents Incorporated by Reference [Text Block] None    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Auditor Firm ID 273    
Auditor Name Prager Metis CPAs, LLC    
Auditor Location Hackensack, New Jersey    
Common Stock, par value $0.00001      
Title of 12(b) Security Common Stock, par value $0.00001    
Trading Symbol CDIO    
Security Exchange Name NASDAQ    
Redeemable warrants, each warrant exercisable for one share of common stock      
Title of 12(b) Security Redeemable warrants, each warrant exercisable for one share of common stock    
Trading Symbol CDIOW    
Security Exchange Name NASDAQ