Garmin Vs Zwift calories way off

Hi all,

Newcomer to zwift as I start to rebuild my confidence on the bike after an injury.

I have my bike rigged up to a Cycleops Fluid 2, and Garmin speed and cadence 2 sensors. My HR is transmitted from my Garmin Venu.

I just had a great ride doing the welcome Fondo workout. But my calorie measurements are way off. Garmin is 588 zwift 398. Which should I trust? And why might this happen?


Check your weight, height and gender on both. They both would use a different formula, it’s all guesstimation anyway.


^^ What Ben said - calories burned are just estimates on any app. IMO, it’s better to choose one app and stick with it to track your fitness goals long-term.