Based on This video

This calculator will determine how much wax and oil to use for your NET WEIGHT of your candle.
To use this calculator, input the net weight for your container in oz and how much % of oil that you want to use.

This is for 1 candle only. If you want it for 3 candle, multiply your NET WEIGHT by 3 and input that into the Net Weight.
If your candle has a net weight of 10oz, multiply by 3 to get 30oz NET WEIGHT and input 30 with same FO % that you use.

Net Weight (oz): oz
Oil %: %