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 »

The mortgage payment formula to calculate a fixed monthly payment is P = L[c(1 + c)^n]/[(1 + c)n - 1]. In this formula, P stands for monthly payment, L is loan, c is the monthly rate and n refers to the month in which th... More »

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The easiest way to calculate a fixed-rate mortgage payment is to use an automatic mortgage payment calculator, such as the one available at BankRate.com. The formula takes into account the amount, length and interest rat... More »

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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 »

The mortgage payment formula to calculate a fixed monthly payment is P = L[c(1 + c)^n]/[(1 + c)n - 1]. In this formula, P stands for monthly payment, L is loan, c is the monthly rate and n refers to the month in which th... More »

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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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A "P&I" payment for a mortgage is a "principal and interest" payment, which is usually made monthly over the term of the loan, according to Quicken Loans. A principal and interest payment does not include taxes and insur... More »