In addition to the @Tomaja method, I wanted to introduce a new way of calculating calories burned according to the steps made during the day
We start from the number of calories burned per minute.
According to the site https://www.regivia.com/comment-maigrir-conseils-solutions-trucs-et-astuces/calcul-des-depenses-energetiques-en-calories-par-sports-et-activites/depenses-caloriques-consommees-pour-la-marche-a-pied/
(sorry for non french users...)
We have to calculate the MET (Metabolic Equivalent of Task)
The MET value for normal walk is 3. This means that you will make 3 times more efforts than when you're resting. For quick walk, the MET will be 3.5, for nordic walk, it will be 5.
Detailed way of calculation for everyday walk :
Kcal / minute : (MET*3.5*Weight)/200
For my watch, I take a 75 kg weight by default, so the result will be :
(3*3.5*75)/200 = 3.93
After that, you can use the formula given by @Tomaja in this topic (http://community.facer.io/t/tomaja-mini-tutorial-how-to-convert-steps-into-miles-kilometres-calories-sport-time/24711)
Then after multiplying the 1st and 2d result, you will have your Kcal !
Don't think I want to correct @Tomaja !! This is just an other way to calculate
Here's where I used it : (inspection mode available of course )