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fin.sinking-fund-factor Calculator
Calculates the periodic deposit needed to accumulate a target amount at a given interest rate over a specified number of periods. Sinking funds are used by companies to set aside money for bond repayment or capital replacement — the calculation is the PMT function of the FV formula.
Inputs
Fv
The target amount you want at a future date. Used to back-calculate how much to invest today.
R Pct
The rate at which interest accrues. Small differences compound dramatically — compare carefully when choosing between lenders.
N
Time for one complete cycle (s). Period = 1 / frequency. A 50 Hz signal has a 20 ms period.
Results
periodic deposit required ($)
Reference formula or conversion factor shown for context.
total deposited ($)
The combined total across all inputs and components.
interest earned ($)
Sample size or count used in the calculation.
SFF = r/((1+r)ⁿ-1)
Reference formula or conversion factor shown for context.
PMT = FV × SFF
Reference formula or conversion factor shown for context.