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Compound Interest CalculatorCalculating Interest Rate for CompoundingCalculating time required to reach goal
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Principal amount  Future amount

Number of years  Number of times per year

Annual interest rate(%):
The formula for Calculating Compound Interest Rate: r =n((F/P)1/nt -1)
  • P =initial principal
  • n = number of times the interest is compounded per year
  • t = number of years
  • F = future amount after time t
  • r = annual nominal interest rate
Example usage: If you start a bank account with $1500 and your bank compounds the interest quarterly at an annual nominal interest rate . Find the balance after 6 years is $1900. Using the formula above, with P = 1200, F = 1900, n = 4, and t = 6: r =4X((1900/1600)1/(4X5)  -1)X100.So, the annual nominal interest rate is 3.96%.

Top Use:    Compound Interest Rate Calculator - Principal:4219 Future:6264 Times:1 Years:5

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