I cannot find such calculator, so far anyway.
One thing that you can do, is google the distance, if the property is 1 mile, from DL, for example, it would be a matter of how long it would take you to walk that mile, remember, that 1,280 feet, makes for one mile. If it takes @3 minutes by car, to travel that one mile, I would say then it would take a person, generally speaking, at least 20 minutes to walk it, possibly longer, depending on exactly where your route would take you. I would work on finding the above out, and then applying it, to an actual map, to see what your walking route will be like.
The ARTS, would be good to take, in the event that you are not going to be driving.