Essentially: You will lose weight, if you use more calories than you take in.
However basing that on your calculated RDI is dangerous. RDI is essentially an educated guess at the number of calories you are using per day. Everyone is different. Going on my RDI and daily usage I should be losing nearly 50% more than I am...
As for your waist, that will vary from day to day and week to week depending on a variety of factors (such as water retention). it is best to measure your loss across a variety of metrics. I use weight & my waist size. And from past experience weeks where I have maintained or even gained on the scales can be weeks where I have suddenly lost size.
42" jeans(25/01/2013) 40"(28/02/2013) 38"(20/03/2013) 36"(25/05/2013)
Down from 60" waist jeans since June 21st 2012.
Mini-goal: Lose as much as I can between now and November 27th when I fly to Florida!
Goal maintain between 224 and 210 until Jan 1st 2014.
St Paul's Cathedral - Climbing to the Whispering Gallery and Beyond!
Florida for a friends wedding and Themeparks!
Onwards and Downwards! http://www.menu52.com/