Net versus gross calories burned

JaredReg

Hello,

I've been on MFP for about 3 weeks now and I've come come across a couple terms I'm not sure about. I'm running on a treadmill every day and I've been using the following link to calculate my calorie burn for my exercise log.

http://www.shapesense.com/fitness-exercise/calculators/running-calorie-burn-calculator.aspx

I noticed the other day that there was a second calculator that takes your net calories burned and converts it to gross calories burned. Which number am I supposed to use when logging calories in MFP?

Thanks!