18 Years’ Worth of Days The average retirement lasts for 18 years, with many lasting even longer. Will you fill your post-retirement days with purpose? Have A Question About This Topic? Name Email Address Message Thank you! Oops! Related Content Historical Inflation This calculator shows how inflation over the years has impacted purchasing power. What To Do When Your Income Reaches 7 Figures Preserve your hIgh net worth with these foundational tips. Managing Money as a Couple Keys to preparing to grow wealthy together.