How many calories do you burn in a cardio workout?

I usually do between 30-45 min cardio. Total burn is anywhere from 375-500 cals.

I always aim to burn at least 10 cals per minute, I usually burn more.

edited to add: I usually run on the treadmill or use the eliptical.

Occasionally I use the spin bike. That burns more calories but doesn't record them.

I burn about a hundred calories per ten minutes, I don't know what the wattage is. That's keeping my heart rate around 178. Usually for an hour, but some times longer. ( Lately 85 minutes) Thats about 88% percent of my max heart rate. Sometimes I go harder, but I can't keep up a heart rate of 185 + for too long. That's on the elliptical. Using a heart rate monitor. Unless you are a very big person I doubt you are burning more than 12 calories a minute.

I ran for 50 minutes with a 15minute cool off walk and hrm says 574 calories

Elliptical would be around 300 per 40 minutes

I do HIIT every day, between 45 -60 mins, and normally burn between 540-870 on the HR

I have not been lifting in about a week, due to my weird new work schedule (making it hard to hit the gym, so been doing HIIT home)

When at the gym, I normally do 30 minutes of elliptical so around 405 calories. I try to keep my HR between 85-90%

I'm way less hardcore than the rest of you

I do 15-30mins cardio-interval training (and 5-10min warm up) plus strength. I burn between 200 and 350 cals on average according to the machine (not accurate I know,getting a HRM off Santa ). I use the elliptical a lot as I prefer it to the treadmill. My heartrate gets high very quickly so it's not difficult (well apart from the feeling like dying!) to keep it up.

I play tennis and racquetball 3x/week and use the elliptical 1-2x/week. It is way easier to keep achieve a good heart rate while playing sports than by using machines, just because it is so much damn fun to move my body. I play racquetball about 45 minutes and play tennis for an hour. My heart rate averages 120 playing tennis and 130 playing racquetball. I burn about 400-600 calories 4-5x/week.

i can't burn more than 500 an hour (well 250 in half hour. i cant keep up cardio for an hour)

I'm currently burning 540-560 calories per 35 minute gym session on the treadmill. I have only just returned to the gym after a year out with a knee injury but I used to be doing double that before my accident.

Way to resurrect a dead thread!

I don't see how anyone can burn 1400 calories in an hour. My hubby burns max around 1000-1100 when he is racing mountain bikes, with his HR pegged in the 190s the entire time.

Granted he is a guy, and they burn more calories than girls do because of the higher muscle mass.

He also weighs around 160 and is 5'8"

Heart rate alone doesn't determine calories burned. Someone very overweight and out of shape will have a higher heart rate when they work out, but that doesn't mean that they are necessarily burning more calories than someone else who is lighter and in better cardio health, with more muscle mass.

I am a 50 yo female, 5'6" and 180. I can ride my bike for an hour, with an average HR in the 150s, and my HRM tell me that I burned 500 calories for that hour. However, if I were to eat an extra 500 calories, then I would not lose weight. I know from over a year's experience on here that I simply do not burn as many calories as my HRM says, and certainly not as many as MFP says I do, which is twice as much as my HRM says.
For this reason, I never count more than 300-400 cals an hour, and don't eat more than half, if that many, back.

Many of the younger, more fit people, especially males, on here can get some great burns and must eat them back to not stall their loss, but you have to know your body and how it responds to exercise over time.
Don't get all excited thinking that MFP tells you that you burned 1000 cals in an hour on the elliptical and now you can go have pizza and ice cream and eat them all back.
Otherwise you will be starting a thread wondering why you are doing 'everything right', but not losing weight.

I used to burn a whole heck of a lot more.. but my heart rate doesn't get very high any more and it certainly doesn't stay high.

I do 60 minutes of cardio most mornings and if I'm on the elliptical at level 10 resistance and pushing 9-10mph I burn about 600-700 calories.

If I run 60 minutes at 10 minute miles, about the same. My heart rate hits about 155-165 or so and doesn't get much higher, except during crossfit WOD's but most of those are done in 4-15 minutes.

Over 100 lbs lost?? Amazing progress!! And I see that you do not eat back all those calories burned. Congrats on your hard work and commitment. You certainly figured out what works for you.

I'm with you Debbie.

All apps, cardio machines and MFP show a burn 30-100% higher than my Garmin HRM. I'm 44, 5ft1in and 67kg.

Today for example 65min = 470cals (HRM), average heart rate 138 (100-160 range) (155 is high for me)

This was my run:
50min running + 10min walking (warm up / cool down). My run included 4km with an incline of 4.5% in 35min and 7.7km total. 2km were downhill, one of which was walking time cooling down. So that would equal about a 5k with incline in 42min, the rest was flat or downhill.

Even with a lower, IMO, more accurate burn, I only eat about 50% of these cals back.

The HR monitor should be correct.

Judging from my heart rate monitor, I burn around 300 calories when I'm on the elliptical for around 45 minutes. That seems pretty low, but I'm not extremely overweight, so maybe that's why? idk.

The HR monitor is correct.

I workout 5-6 days a week. My cardio exercises are usually 60-70 minutes long. The cal burn is usually between 750-830 cals each time as well. Depends on how I feel that day. I use a stationary bike with levels of resistance and a cal counter.

Found it: http://www.myfitnesspal.com/topics/show/1044313-this-is-why-hrms-have-limited-use-for-tracking-calories?hl=accuracy+of+HRM&page=1#posts-16031917

ETA: This is from the same poster as the blog link above, but it's more recent, not sure how much they differ.