v3.26.1

Cover - USD ($) $ in Millions	12 Months Ended
Cover - USD ($) $ in Millions	Dec. 31, 2025	Apr. 29, 2026	Jun. 30, 2025
Cover [Abstract]
Document Type	10-K/A
Amendment Flag	true
Amendment Description	This Amendment No. 1 on Form 10-K/A (this Amendment No. 1) amends the Annual Report on Form 10-K of Expion360 Inc., a Nevada corporation (Expion360, the Company, we, or us), for the fiscal year ended December 31, 2025 (the Original Report), filed with the U.S. Securities and Exchange Commission (the SEC) on March 17, 2026 (the Original Filing Date). The sole purpose of this Amendment No. 1 is to include the information required by Items 10 through 14 of Part III of Form 10-K (the Part III Information) and to delete the disclosure regarding incorporation by reference on the cover page of our Original Report.
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	001-41347
Entity Registrant Name	Expion360 Inc.
Entity Central Index Key	0001894954
Entity Tax Identification Number	81-2701049
Entity Incorporation, State or Country Code	NV
Entity Address, Address Line One	2025 SW Deerhound Avenue
Entity Address, City or Town	Redmond
Entity Address, State or Province	OR
Entity Address, Postal Zip Code	97756
City Area Code	541
Local Phone Number	797-6714
Title of 12(b) Security	Common Stock, $0.001 par value per share
Trading Symbol	XPON
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			$ 3.1
Entity Common Stock, Shares Outstanding		11,438,298
ICFR Auditor Attestation Flag	false
Document Financial Statement Error Correction [Flag]	false

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Expion360 Inc. 10-K/A