Kettlebell Workout

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I read online that kettlebell workouts are a great way to burn calories and combine weights with cardio. However I'm not sure how to input this for my exercise. Today I did a 20 min kettlebell workout and just put it in as a weight workout which came in at 100 cals. burned. Several articles I read online said a 25 min workout can burn around 350 cals. Now I know that the article may be incorrect also but does anyone have a solution to entering this into my exercise diary? I would input my own number but I'm really not sure of what it would be. Thanks!