Compound interest calculator with graph help

Settings Remark
Calculate The compound interest can be calculated with the following equation:
FV = P * (1 + (R / N))N * T
FV = P + I

where:
FV = Future value
I = Interest amount
P = Principal initial amount
R = Nominal interest rate per year (as a decimal, not in percentage)
T = Time period in years
N = Number of compounding periods in one year

Other variations of the compound interest equation are used to calculate:
• The future value (FV) and interest amount (I)

FV = P * (1 + (R / N))N * T
I = FV - P

• The principal amount (P)
 P = FV or P = I (1 + (R / N))N * T (1 + (R / N))N * T - 1
• The nominal interest rate per year (as a decimal, not in percentage)

R = N * ((FV / P)1 / (N * T)   - 1)

or

R = N * ((I / P) + 1)1 / (N * T)   - 1)

• The time period (T) in years
 T = log(FV / P) or T = log((I / P) + 1) N * log(1 + (R / N)) N * log(1 + (R / N))
• The compounding periods (N) in one year
 N = log(FV / P) or N = log((I / P) + 1) T * log(1 + R) T * log(1 + R)
• The effective interest rate (Re) (as a decimal, not in percentage)

Re = (1 + (R / N))N   - 1

Note:
The effective interest rate is the equivalent rate of compound interest earned over a period of one year for a nominal interest rate per year which is compounded twice or more over the year.