Investment Payment Calculator Future Amount (F) : Payment Amount (P) : Rate of Interest (i) : % Rate of Interest Compounded Monthly Quarterly HalfYearly Annually Number of Payments (N) : Investment Payment Formula:N = [ log ( 1 + [ ( r*F ) / P ] ) ] / ( log (1+r) )Where,F = Future AmountP = Payment AmountN = Number of Paymentsr = Rate of Interest (compounded)