Costs will vary from person to person for many reasons (freebies from family/friends, different areas have different prices, etc.), but decided to share this for those interested in having children in the future so they can see how much they might end up spending.
Also note this is only for ONE child so costs might double if you have twins or choose to have a second child. It also does not include when your children have kids and you become grandparents. As many of us know grandparents can contribute quite a bit to the cost of a grandchild. So might want to tack on a few thousand for the future grand kids, if you plan on helping out that is.
Again, this is just an ESTIMATE and there are MANY factors that can affect how much it costs YOU to have a child, but making this spreadsheet was very helpful for us in deciding on when we think we are ready to add to our family and thought it might be helpful for others who also want to plan ahead rather than just jumping in.