v3.26.3
Cover
 12 Months Ended
Jun. 30, 2026
shares
Document Information [Line Items]  
Document Type 20-F
Document Registration Statement false
Document Annual Report true
Document Transition Report false
Document Financial Statement Error Correction [Flag] false
Document Shell Company Report false
Entity Interactive Data Current Yes
Document Accounting Standard International Financial Reporting Standards
Amendment Flag false
Document Period End Date Jun. 30, 2026
Document Fiscal Year Focus 2026
Document Fiscal Period Focus FY
ICFR Auditor Attestation Flag false
Entity Registrant Name Critical Metals Corp.
Entity Central Index Key 0001951089
Current Fiscal Year End Date --06-30
Entity Well-known Seasoned Issuer No
Entity Voluntary Filers No
Entity Current Reporting Status Yes
Entity Filer Category Accelerated Filer
Entity File Number 001-41973
Entity Shell Company false
Entity Emerging Growth Company true
Entity Ex Transition Period false
Entity Incorporation, State or Country Code D8
Entity Address, Address Line One Kingston Chambers
Entity Address, Address Line Two PO Box 173
Entity Address, City or Town Road Town
Entity Address, Country VG
Entity Address, Postal Zip Code 00000
Entity Common Stock, Shares Outstanding 146,993,753
Business Contact [Member]  
Document Information [Line Items]  
Entity Address, Address Line One 251 Little Falls Drive
Entity Address, City or Town Wilmington
Entity Address, State or Province DE
Entity Address, Postal Zip Code 19808
City Area Code (302)
Local Phone Number 636-5400
Contact Personnel Name Corporation Service Company
Ordinary shares, par value $0.001 per share  
Document Information [Line Items]  
Trading Symbol CRML
Title of 12(b) Security Ordinary shares, par value $0.001 per share
Security Exchange Name NASDAQ
Warrants, each exercisable to purchase one ordinary share at an exercise price of $11.50 per share  
Document Information [Line Items]  
Trading Symbol CRMLW
Title of 12(b) Security Warrants, each exercisable to purchase one ordinary share at an exercise price of $11.50 per share
Security Exchange Name NASDAQ