In most cases, you can substitute maple syrup for molasses at a 1 to 1 ratio, so no complex recipe math is required. However, do be mindful of the fact that maple syrup is a much runnier liquid ...
In a pinch, you can substitute maple syrup for light molasses, which may also be listed as “sweet,” “first,” “mild,” or “Barbados” molasses. The light variety might be your best ...