Cover - shares	9 Months Ended
	Dec. 31, 2020	Feb. 16, 2021
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Dec. 31, 2020
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2021
Current Fiscal Year End Date	--03-31
Entity File Number	000-11882
Entity Registrant Name	B2Digital, Inc.
Entity Central Index Key	0000725929
Entity Incorporation, State or Country Code	DE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		783,890,550
Entity shell company	false