Invesment Calculator  




Where,
P = Payment Amount
F = Future Amount
r = Rate of Interest (compounded)
N = Number of Payments
Rate of Interest Compounded is,
If Monthly,
r = i / 1200
If Quarterly,
r = i / 400
If Half yearly,
r = i / 200
If Yearly,
r = i / 100
Examples:
[Log (1+[(5%+100000)/1000])] / (log (1+5))
Log( 1+(105000)/1000) / log (1.05) = 83.77
Therefore the number of payment in investment is 83.77 times.