Friday, August 8, 2008

more formulas

Other than the common formula and also rule of 72, these are useful formulas too ...

Compound Interest Future Value

FV = PV * ( 1 + i )N

PV = present value

FV = future value (maturity value)

i = interest rate in percent per period

N = number of periods



Annuity

FV = PMT * [ ( ( 1 + i )N - 1 ) / i ]

FV = future value (maturity value)

PMT = payment per period

i = interest rate in percent per period

N = number of periods



Simple Interest Amortized Loan Formula

PV * ( 1 + i )N = PMT * [ ( 1 + i )N - 1 ] / i

PMT = the payment per period

i = interest rate in percent per period

PV = loan / mortgage amount

N = number of periods



Online Calculators