Spark has the calculation here as part of how they work out your range: www.sparkpeople.com/resource/calorie_calcu
Be wary that you know how to use it though! Eg 1366 is not how many calories you should eat when you're at your goal weight. It's only your BMR, not your total daily burn. BMR is what your body would burn if you were comatose. But you're not.
Spark adds another 20% for that, so about 1640 really, before exercise.
It's recommended most healthy adults get 30-60 minutes of exercise every day. So let's assume a healthy lifetime lifestyle of a daily average of 300 calories burned.
So if your BMR is 1366 and you want to maintain your weight, you would eat around 1800-2100 calories daily.
(1366+20%=1640+300=1940, average around that for a range).
Edited by: UNIDENT at: 1/23/2013 (13:23)