Interest Rate Calculator

Online calculator to calculate interest rate of a product using david cantrell's approximate solution method. Calculate the monthly payment to be paid with the given number of payments, interest rate, and loan amount.

Interest Rate Calculator

Initial Amount (A) :
Payment Amount (P) :
Number of years (n) :
Interest Rate (i) ≈ %
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Formula Used:

i ≈ [ ( 1 + ( P/A ) ) 1/q - 1 ] q - 1
Where, q = log[ 1 + (1/N) ] / log2 N = n * 12 P = Payment Amount A = Initial Amount N = Number of Payments

Calculate the interest rate by using David Cantrell's Approximate solution method.

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