| Cover | Dec. 18, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Dec. 18, 2024 |
| Entity Registrant Name | American Healthcare REIT, Inc. |
| Entity Incorporation, State or Country Code | MD |
| Entity File Number | 001-41951 |
| Entity Central Index Key | 0001632970 |
| Entity Tax Identification Number | 47-2887436 |
| Entity Address, Address Line One | 18191 Von Karman Avenue |
| Entity Address, Address Line Two | Suite 300 |
| Entity Address, City or Town | Irvine |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 92612 |
| City Area Code | 949 |
| Local Phone Number | 270-9200 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.01 par value per share |
| Trading Symbol | AHR |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
