Can't work it out, help please.

I get 361 here? Maybe it takes our individual bmi into account?

I did 30 min on the treadmill and could only find one entry in the database to enter. It calculated the 30 minutes as 534 calories. That's way to high , surely. I need to find out for sure how to get it right as I don't want to be eating calories I shouldn't be and yesterday with that amount I couldn't eat them all anyway.
Any help much appreciated. thanks.

It depends on your weight and activity. If you weigh more, you'll burn more.

Intensity, speed, distance, sex, and weight all play a role in how many calories you burned. I have found that MFP sometimes "overestimates" calories burned. Try using this:

http://www.exercise4weightloss.com/exercise-calorie-calculator.html

For example, if I put in that I walked 30 minutes at 2 mph, I would only have burned 127 calories, but if I walked those same 30 minutes at 5mph, then it jumps to 318 calories. Good Luck!

@rodney & @ Jeff. Well, that's an amazing database if it does that then. You think it really does works it out on my weight?

the data base won't take into account your weight, etc, the data base is full of user entered exercises. you can try to find the one that indicates the speed you were going (ie, 3.0 mph, uphill) but you won't get a very accurate reading unless you snag a heart rate monitor.....and even then the jury is out on just how accurate they are!

Yes, it does take into account your weight and BMI when giving you exercise calories. Initially, when I did 30mins, it was giving me 450. Now, after I lost 20 pds, it gives me closer to 300 calories. When you think about it, makes sense; assuming you keep the same speed, its harder to walk 3 miles in 30 mins when you are 300pounds vs. 200 pounds.

The key is the speed. Try to find out the distance you walked in the amount of time. For example, if you walked 2 miles in 30mins, then look for the entry "Walking, 4.0mph". You can tell the faster you go, the more calories you burn. Hope this helps.

@rodney & @ Jeff. Well, that's an amazing database if it does that then. You think it really does works it out on my weight?

the data base won't take into account your weight, etc, the data base is full of user entered exercises. you can try to find the one that indicates the speed you were going (ie, 3.0 mph, uphill) but you won't get a very accurate reading unless you snag a heart rate monitor.....and even then the jury is out on just how accurate they are!

This is incorrect. The MFP database for exercise calories DOES take your weight, age, height, gender, etc. Into account. (edited to add - at a minimum it considers your weight. Possibly other factors.) User-entered exercises are only available to that individual user - you can't access stuff other users have entered - it's not like the food database.

The treadmill and other equipment I use at the gym I go to has the calories on the machine. I have to input my weight and age though and I guess it calculates it like that. My friend weighs less than me but does the same regime, and she burns less calories because of it.
If I can give you an example it might help......I go on for 15 mins, a mixture of fast walking up an incline and short quick runs in between and I burn approx 150 calories.

Try this site.... http://www.caloriesperhour.com/index_burn.php then click "Activity Calculator". You can put in your weight, and choose from activities that will help you get a 'hopefully more accurate' result. I often use it on activities that I don't do very often! It's more weight based and when you weigh more, as others have said, it takes more energy to move your weight around. Hope that helps!! I use a HRM for all of my caloric burns. Might wanna save up for one

Weight will absolutely play a factor in how many calories you burn (and the MFP and most (if not all) calculators will take that into account). The more you weigh, the more calories you burn doing the same excercise. But, fitness level will also play a roll in how many calories you burn -- a 150 lb. fit man will burn fewer calories when running 30 mins. at 5 mph than a 150 lb. out-of-shape man running the same distance at the same speed. So, even the best calculators/databases are only going to be an estimate.

The treadmill/elliptical always puts my calories burned at about 200-300 calories over what I actually burn. But my friend, who is just starting out excercising, uses the same machines, and it always under-estimates her calorie burn.