I'm not sure I understand what you are asking. Are you asking how to determine your own guide number? If so, and you prefer to work in metric, then your distance of 1 meter makes it easy. If your flash meter exposure at 1 meter was say, f11, then your metric guide number for the flash is 11. If you move the flash to 2 meters, your aperture will be 11/2= f5.6. If you move the flash to 0.5 meters, then your aperture will be 11/0.5= f22.

Is this what you are asking, or am I misunderstanding?