v3.26.1
Document and Entity Information
Jun. 08, 2026
Entity Addresses [Line Items]  
Entity Address, Address Line One 12 Greenway Plaza
Entity Address, Address Line Two Suite 1100
Entity Address, City or Town Houston
Entity Address, State or Province TX
Entity Address, Postal Zip Code 77046
Entity Registrant Name INTERNATIONAL BATTERY METALS LTD.
Document Type 8-K
Amendment Flag false
Entity Central Index Key 0001786318
Document Period End Date Jun. 08, 2026
Entity Emerging Growth Company true
Entity Ex Transition Period true
Entity File Number 333-286616
Entity Incorporation, State or Country Code A1
Entity Tax Identification Number 00-0000000
City Area Code 832
Local Phone Number 683-8839
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
TSX Venture Exchange  
Entity Addresses [Line Items]  
Title of 12(b) Security Common Shares, no par value
Trading Symbol IBAT
OTCQB  
Entity Addresses [Line Items]  
Title of 12(b) Security Common Shares, no par value
Trading Symbol IBATF