Welcome, Carol! It's nice to have you here.
Your question about ideal weight is a huge subject. There are many charts and equations that can be used as starting points, but they are only that. You will find what best fits you.
I used
this chart which compares the 1959 and 1983 height and weight tables used by the Metropolitan Life Insurance company. The table for women is at the bottom of the page. Some are more comfortable being at the low end of the spectrum and some at the high. At different years, the insurance company has decided, according to the statistics of those insured with them, that particular people at a particular weight lived longer, and so they publish different height/weight charts according to the statistics, for a very small group of people.
Here is an
interesting comparison of height/weight tables and some notes about the arbitrariness of the tables and their lack of basis in evidence. This site states, again, that no chart can determine what is right for someone.
Here,
a scholarly attempt to determine ideal weight for women. They still haven't found it.
An article in the NY Times on the absurdity in arbitrarily deciding ideal weight for others according to the insurance company's tables.
Here,
some interesting examples of how to calculate normal body weight in a book at google. This book includes the simple equation for women that for 5 feet at 100 and 5 pounds for every inch over that. Might be fine for some folks and very wrong for others. The equation does not take frame size, age, or proportion of fat to muscle into account.
All these charts and equations are starting points, but finding what fits is up to each of us.
Hope this helps a bit. It can be a controversial area of discussion for many. For those of us who just want to look and feel our best, we'd like something simpler.
You can see in looking at the statistics in the profiles of folks here at 3fc that women of the same height choose very different weights as their goal. Some choose to weigh less than what the charts and equations say, some more. There are legitimate reasons for those choices. A ballerina must weigh less than what a modern dancer can weigh. There are athletes who need to weigh less or more than what the insurance company's statistics state.
I like being sleek and missed it while I was heavier. Others like being more solid or a tad rounder, for their reasons. It's great to be able to choose.
All the best to you!