A good estimate is lo orbit load + last stage fuel mass Replying to: Do any of you know of an online calculator to estimate range based on payload -- Canis Majoris Post ReplyForum ChairmanMaohamet 12/28/2019, 17:50:38 Author Profile | Edit Recommend | Alert | 5 4 3 2 1 0 -1 -2 -3 -4 -5 Where am IGo Up Go TopPost ReplyBack