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There are two scenarios the calculator is designed for. The first is that you have a column with a certain width (perhaps to achieve a nice word:line ratio). You wish to find a matching column. Type in the width and use the left side, which gives you both a smaller and larger column.

Effective web design doesn't have to be pretty and colorful - it has to be clear and intuitive; in fact, we have analyzed the principles of effective design in our previous posts. However, how can you achieve a clear and intuitive design solution?