v3.26.1
Cover - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2026
May 18, 2026
Sep. 30, 2025
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Mar. 31, 2026    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2026    
Current Fiscal Year End Date --03-31    
Entity File Number 001-42546    
Entity Registrant Name Fatpipe Inc/UT    
Entity Central Index Key 0001993400    
Entity Tax Identification Number 27-1113325    
Entity Incorporation, State or Country Code UT    
Entity Address, Address Line One 392 East Winchester Street    
Entity Address, Address Line Two Fifth Floor    
Entity Address, City or Town Salt Lake City    
Entity Address, State or Province UT    
Entity Address, Postal Zip Code 84107    
City Area Code (801)    
Local Phone Number 281-3434    
Title of 12(b) Security Common Stock, No Par Value Per Share    
Trading Symbol FATN    
Security Exchange Name NASDAQ    
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     $ 41.8
Entity Common Stock, Shares Outstanding   14,024,468  
Documents Incorporated by Reference [Text Block] None.    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Auditor Firm ID 6727    
Auditor Opinion [Text Block] We have audited the accompanying consolidated balance sheets of FatPipe, Inc. and its subsidiaries (the “Company”) as of March 31, 2026 and 2025, the related consolidated statements of operations and comprehensive income, statements of stockholders’ equity, and statements of cash flows, for each of the two fiscal years in the period ended March 31, 2026, and the related notes (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company as of March 31, 2026 and 2025, and the results of its operations and its cash flows for each of the two fiscal years in the period ended March 31, 2026, in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”).    
Auditor Name Suri & Co., Chartered Accountants    
Auditor Location Chennai, India