Monthly rate = (1 + effective annual return)^(1/12) − 1.
WEALTH BUILDING · FORWARD AND REVERSE CALCULATIONS
Compound interest & regular contributions
Separate contributions from growth, convert to today's purchasing power, or solve for starting capital, contributions, duration or required return.
Formula used
Each contribution is applied at the selected beginning or end of period and at the chosen monthly or annual frequency.
Real value = future value / (1 + inflation)^years.
Sources and formulas
Model assumptionsMonthly compounding with end-of-month contributions. This is a model, not a return guarantee or investment recommendation.