Find the exact time for an investment to triple.
The same logarithmic method as doubling time, solved for a threefold increase instead of twofold.
Years: ln(3) ÷ ln(1 + rate)
Why does tripling take longer than doubling by more than 50%?
Growth compounds, so each extra multiple takes longer, even though the rate stays the same. Going from double to triple actually takes almost as long as going from your starting amount to double.