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Cover - USD ($)
 12 Months Ended
Dec. 31, 2025
Mar. 22, 2026
Jun. 30, 2025
Cover [Abstract]      
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 001-40792    
Entity Registrant Name BTCS Inc.    
Entity Central Index Key 0001436229    
Entity Tax Identification Number 90-1096644    
Entity Incorporation, State or Country Code NV    
Entity Address, Address Line One 303 W. Lancaster Ave #336    
Entity Address, City or Town Wayne    
Entity Address, State or Province PA    
Entity Address, Postal Zip Code 19087    
City Area Code (202)    
Local Phone Number 987-8368    
Title of 12(b) Security Common Stock, par value $0.001    
Trading Symbol BTCS    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Reporting Status Current Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 33,925,000
Entity Common Stock, Shares Outstanding   49,754,240  
Documents Incorporated by Reference Portions of the registrant’s Proxy Statement for the 2026 Annual Meeting of Stockholders are incorporated herein by reference in Part III of this Annual Report on Form 10-K to the extent stated herein. Such Proxy Statement will be filed with the Securities and Exchange Commission (the “SEC”) within 120 days of the registrant’s fiscal year ended December 31, 2025    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Entity Listing, Par Value Per Share $ 0.001    
Auditor Opinion [Text Block] We have audited the accompanying balance sheets of BTCS Inc. (The “Company”) as of December 31, 2025 and 2024 and the related statements of operations, stockholders’ equity, and cash flows for each of the years in the two-years period ended December 31, 2025 and 2024, and the related notes (collectively referred to as the financial statements). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2025 and 2024, and the results of its operations and its cash flows for each of the years in the two-years period ended December 31, 2025 and 2024, in conformity with accounting principles generally accepted in the United States of America.    
Auditor Name RBSM LLP    
Auditor Firm ID 587    
Auditor Location New York, NY