Which is more accurate: Precor Treadmill or Ionic?

[Crutchbender]

When I do the Precor treadmill down the gym it says I've burned 600 calories but when I check my Ionic it says 480 calories. Which one do you trust?

Same when I do the Precor elliptical machine. Last time I used it the machine showed I burned 575 calories but checking my Ionic and the figures were much less, just 455 calories.

And so my question is, which is more accurate?

Thanks

[mlspina10 · Accepted solution]

Do you put your height and weight information into the treadmill? If not - i would say the fitbit is likely more accurate. If you do, i have no idea which one i would trust more...