Good question, and maybe that is why guys inject 3x/ week instead of EOD, now that I think about it.
But it’s very easy, you just take whatever dose you are on per week, divide it by 7 to get how much you would inject daily, and then just double that number to get how much to inject EOD. So for 120mg/ week, you just divide that by 7, which would equal 17.14. You can either round that down, or up, which would give you 17 or 18. Then double that. Which would give you 34 or 36. So if you were on 120mg/ week total, and wanted to inject EOD, you would either inject 34mg or 36mg EOD, depending on whether you rounded down or up.