First, enter your recent race distance. For calculations, we assume run distance = 10 km. Then, fill in the recent race time. For example, run time = 48 min 12 sec. Now you can see your estimated V02 levels: VO2 max = 41.77 ml/kg/min. VO2 based on your race pace = 37.69 ml/kg/min, which is equal 90.24 % of V02 max. 9CekJ4.