Skip to main content

kJ and Kcal Rouvy -> Strava Web

  • January 20, 2026
  • 2 replies
  • 29 views

Forum|alt.badge.img+1

Hi, 

Winter time is virtual time so I do my exercises indoor with Rouvy and Zwift. 

While Rouvy workout is measured in Kcal, Strava App shows also Kcal, the Web-Version is in kj. This is a Web-bug, or ?

 

Kind regards, Martin

 

2 replies

Jan_Mantau
Forum|alt.badge.img+27
  • Hub Superuser Alumni
  • January 20, 2026

It’s not a bug, the kj is the mechanical work you have produced based on your power output whereas the kcal is the estimated energy cost of the activity. The web version usually shows both kj and kcal, the latter mislabeled as “Calories”:

 


Forum|alt.badge.img+1
  • Author
  • Hub Rookie
  • January 21, 2026

ah, OK. Thank you for explaining. I was just stuck in the 1:4 Ratio kj and kcal. 

Thank you Jan