Document and Entity Information
 3 Months Ended
Jun. 30, 2012
Aug. 07, 2012
Document And Entity Information    
Entity Registrant Name Grid Petroleum Corp.  
Entity Central Index Key 0001399306  
Document Type 10-Q  
Document Period End Date Jun. 30, 2012  
Amendment Flag false  
Current Fiscal Year End Date --03-31  
Is Entity a Well-known Seasoned Issuer? No  
Is Entity a Voluntary Filer? No  
Is Entity's Reporting Status Current? Yes  
Entity Filer Category Smaller Reporting Company  
Entity Common Stock, Shares Outstanding   236,123,987
Document Fiscal Period Focus Q1  
Document Fiscal Year Focus 2012