Calories count on Apple Watch off by factor 1000 than on Health App.

When I start a training on watch app like "Walking" then I see already after 2 minutes that a used a few Kilo-Calories (kcal). When I later show at my activities on the iPhone's Activity App then the units seem to have changed to calories which means the k for kilo was forgotten and my calorie-count is off by factor 1000. A short look into Internet shows that walking requires approx. 2 - 10 kcal per minute. Thus the app on the watch is correct and the activity app is incorrect. The health app shows the same error. Needless to say that other apps like heartwatch, which use data from the health app struggle with the same problem.