Solve Amortization
The formula estimates a fixed periodic payment for a fully amortizing loan. The schedule then separates each payment into interest and principal.
Formula: M = P[r(1+r)^n] Γ· [(1+r)^n β 1]
Keep rates, balances, prices, and time periods on the same basis. An annual rate should not be combined with a monthly period unless the formula accounts for that conversion.
Check the final amount against the starting figure and rate. A large unexpected difference often points to a period or percentage entered in the wrong form.