Digital cameras are 4:3. Video cameras can be either 4:3 or HD 16:9. Convert MP to X and Y (4:3) MP X=, Y= X=√(4/3*1000000*MP) Y=√(3/4*1000000*MP) Convert MP to X and Y (16:9) MP X=, Y= X=√(16/9*1000000*MP) Y=√(9/16*1000000*MP) Convert X and Y to MP X=, Y= MP MP=X*Y/1000000