The estimated range on my 2012 Leaf has always been wildly inaccurate. Costco is about 20 miles from my house. I started out with a full charge and 71 miles on the estimate. After getting there, the estimate showed only 27. If this was actually accurate, I wouldn't be able to make it home. By the time I got home, the estimate showed 29 miles. So I gained 2 miles. Crazy huh? The estimate got more and more accurate as I got closer to home.
Btw, the road conditions were mostly flat, half the trip was on the highway driving at 65MPH. It was a hot day and I had the AC on the entire trip.
But anyway, if you are a new Leaf owner, there is an 80% SOC limiter unless you turn it off. If you're not getting the estimated miles that you are expecting, double check to see if that 80% limiter is on or off. I forgot what it's called because I turned that off many years ago. This is something that Nissan said in the book that if you don't need 100% every time, it's better to charge to 80% to reduce battery degradation.