Doubling Time: Exact Logarithms and the Limits of Shortcuts
Calculate how long constant compound growth would take to double a balance, compare rate sensitivity, and understand why a shortcut is not a forecast.
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Compare two loans at a common exit date, or two savings plans with the same deposits and horizon. See the costs, balances and assumptions side by side.
From the library
Calculate how long constant compound growth would take to double a balance, compare rate sensitivity, and understand why a shortcut is not a forecast.
Quantify a hypothetical yield tradeoff for accessible cash, distinguish forgone growth from an actual loss, and weigh timing against a narrow rate comparison.
Recalculate after a missed contribution, distinguish a temporary funding gap from lost growth, and choose an explicit catch-up schedule before a deadline.