The Mortgage Constant (also called the Mortgage Capitalization Rate and The Amount to Amortize $1) is the ratio of the periodic debt service to the original loan amount.

Column six of the compound interest tables contain the mortgage constant. This column is called "Amount to Amortize $1", "Partial Payment", or "Mortgage Capitalization Rate".

Mortgage payment = Original Principle x Mortgage Constant (from column 6)

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