Focus Universal Inc. Annual report [Section 13 and 15(d), not S-K Item 405]

Leases (Details Narrative) - USD ($)	12 Months Ended
Leases (Details Narrative) - USD ($)	Dec. 31, 2024	Dec. 31, 2023
Operating lease cost	$ 143,097	$ 143,097
Focus Universal Shenzhen [Member]
Lease description	On June 1, 2024, Focus Universal (Shenzhen) Technology Co. LTD entered into a twelve-month commercial lease with a third party for an approximately 1,701 square foot office space as a sales-focused office. The lease commenced on June 1, 2024 and will end on May 31, 2025. The monthly rent is RMB8,000 (approximately $1,141).
Focus Universal California [Member]
Lease description	On July 8, 2024, the Company entered into a Standard Industrial/Commercial Single-Tenant Lease (the “Lease”) with the Veena Asset Management, LLC to lease the same Focus Universal premises located at 2311 East Locust Court, Ontario, CA 91761 back for one year commencing at the close of escrow of the Purchase Agreement and ending on July 31, 2025, for 14,004 square foot office and warehouse space. Base monthly rent is $16,804, with a total of $58,812 due upon execution of the lease.