Reading the result
The headline figure is your gross — day rate times billable days, plus per diem. The estimate then nets out a combined burden for self-employment tax, liability and workers-comp insurance, and the unpaid gaps between wells, since a 1099 day rate must self-fund all of that. Equal-time rotations like 14/14 work out to roughly 182 billable days a year; 180–220 is a realistic planning band. This is a rough estimate, not tax advice. See day rate vs. salary for the full comparison.