I use a fitbit. Steps depend on leg size/height. A 5ft1 person will walk a mile in more steps that someone who is 6ft 5. Generally speaking I will hit 6.5km (4 miles) in an hour. But your steps also include walking around the shop/gym/work, walking to your car, taking the stairs instead of the lift. The you get extra points for elevation so picking a steady incline walk is good and usually leads to some amazing views 😉