Formula Library
Savings & Interest Formulas
Compound interest calculations, savings goal projections, and emergency fund planning formulas.
Compound Interest (FV)
beginnerCalculate how much your savings will grow over time with compound interest.
=FV(rate/12, periods, -monthly_contribution, -initial_deposit) Rule of 72
beginnerQuickly estimate how long it takes for an investment to double at a given interest rate.
=72/annual_rate Savings Goal Timeline
intermediateCalculate how many months it will take to reach a savings goal with regular contributions.
=NPER(rate/12, -monthly_savings, current_savings, -goal_amount)