Heart rates effect on calories lost@ the gym?

Hi there was just wondring about the acuracy of some of the mashines at the gym and if all heart rate monitors are acurate or if calories are acurate as well. I know that some more modren mashines like the elipticals sometimes overestimate the calories one burnes so ive been focusing more on the heart rate levels. But i got on the ramp mashine, dont know exactly what its called. And i burned just as much calories as i did on the tredmill in the same amount of time and my heart rate was like 20 points or more higher. Only that i felt as if it was so much easier. Can i count on this mashines acuracy. Are all the heart rate monitors the same?

Thanks

The ones on those machines are not all that accurate. As for HR monitors in general some are more accurate then other, but in the end it's all guestimation.

UD

your should buy a heart rate monitor. they're much more accurate