v3.25.1
Cover
 12 Months Ended
Dec. 31, 2024
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 U.S. GAAP
ICFR Auditor Attestation Flag false
Amendment Flag false
Document Period End Date Dec. 31, 2024
Document Fiscal Year Focus 2024
Document Fiscal Period Focus FY
Entity Information [Line Items]  
Entity Registrant Name BTC Digital Ltd.
Entity Central Index Key 0001796514
Entity File Number 001-39258
Entity Incorporation, State or Country Code E9
Current Fiscal Year End Date --12-31
Entity Well-known Seasoned Issuer No
Entity Voluntary Filers No
Entity Current Reporting Status Yes
Entity Shell Company false
Entity Filer Category Non-accelerated Filer
Entity Emerging Growth Company true
Entity Ex Transition Period false
Entity Contact Personnel [Line Items]  
Entity Address, Address Line One 61 Robinson Road
Entity Address, Address Line Two Level 6 & 7#738
Entity Address, City or Town Singapore
Entity Address, Country SG
Entity Address, Postal Zip Code 068893
Entity Listings [Line Items]  
Title of 12(b) Security Ordinary Shares, par value US$0.06 per share
Trading Symbol BTCT
Security Exchange Name NASDAQ
Entity Common Stock, Shares Outstanding 6,434,040
Business Contact [Member]  
Entity Contact Personnel [Line Items]  
Contact Personnel Name Siguang Peng
Contact Personnel Email Address ir@btct.us
Entity Address, Address Line One 61 Robinson Road
Entity Address, Address Line Two Level 6 & 7#738
Entity Address, City or Town Singapore
Entity Address, Country SG
Entity Address, Postal Zip Code 068893
Entity Phone Fax Numbers [Line Items]  
City Area Code +65
Local Phone Number 6022 2515