A shortcut to estimate the number of years required to double your money at a given annual rate of return. Divide the rate, expressed as a percentage, into 72. Years required to double an investment = 72 ÷ compound annual interest rate. For example, if you start with $1,000 and want to know how long it will take to double to $2,000 at an interest rate of 20%, then the calculation is: 72 ÷ 20 = 3.6 years.
Leadership Advocate and Co-Founder of the Goldzone Group. I help leaders to master the new rules of leadership for the new economy. Over the past 30 years, I have visited over 500 cities in 54 countries to explore, learn from, and help many of the world’s leading companies, leaders, and luminaries in the fields of science, technology, health, finance, entrepreneurship, and leadership.