Get a quick snapshot based on your numbers. This covers principal and interest only - your actual payment will also include property taxes and homeowners insurance.
Based on your current estimate
Amortization is paying off debt over time in equal installments. As the term of your mortgage loan progresses, a larger share of your payment goes toward paying down the principal until the loan is paid in full at the end of your term.
By adding extra payments, you can pay off your loan faster and save on interest.