| Cover | May 17, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | May 17, 2022 |
| Entity File Number | 0-28331 |
| Entity Registrant Name | CAPSTONE COMPANIES, INC. |
| Entity Central Index Key | 0000814926 |
| Entity Tax Identification Number | 84-1047159 |
| Entity Incorporation, State or Country Code | FL |
| Entity Address, Address Line One | 431 Fairway Drive |
| Entity Address, Address Line Two | Suite 200 |
| Entity Address, City or Town | Deerfield Beach |
| Entity Address, State or Province | FL |
| Entity Address, Postal Zip Code | 33441 |
| City Area Code | 954 |
| Local Phone Number | 570-8889 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
