The formula used to calculate annual percentage rates on mortgage loans is L - F = P1/(1 + i) + P2/(1 + i)2 +… (Pn + Bn)/(1 + i)n, cites the Mortgage Professor. Known as the internal rate of return, the APR includes poin... More »

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Mortgage rates for Citizens Bank customers are dependent on the property address and purchase price, the purpose of purchase, loan amount how the property is used and other factors, according to Citizens Bank. The credit... More »

Microsoft Excel offers tools to calculate annual percentage rate, notes About.com. The APR derives from the principal amount, associated interest rate, closing costs, and total time to maturity. More »

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The formula for calculating a monthly mortgage payment on a fixed-rate loan is: P = L[c(1 + c)^n]/[(1 + c)^n - 1]. The formula can be used to help potential home owners determine how much of a monthly payment towards a h... More »

An annual percentage rate is used to refer to the yearly fee that a customer pays for borrowing money and is often called APR. An APR is most commonly used in cases of loans, credit cards or other credit agreements. More »

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The labor force participation rate can be calculated by dividing labor force by working age non-institutionalized population and multiplying the resulting figure by 100. This helps to know the number of people who are em... More »

To calculate your mortgage payment manually, apply the interest rate (r), the principal (B) and the loan length in months (m) to this formula: P = B[(r/12)(1 + r/12)^m)]/[(1 + r/12)^m - 1]. This formula takes into accoun... More »