Mortgage payment formulas, amortization schedules, extra principal and worked loan-payment scenarios. Use the calculators for your own numbers and the guides for formulas, examples and common questions.
Use the tool that matches the exact problem you need to solve.
Estimate a fixed-rate mortgage payment, total interest and total of payments from the loan amount, interest rate and term.
Calculate a fixed-rate loan payment and view how principal and interest change through an amortization schedule.
Estimate how an extra monthly payment can shorten a mortgage payoff timeline and reduce interest.
Compare a standard monthly mortgage schedule with an accelerated biweekly payment approach.
10 focused guides and worked examples for this calculator cluster.
Compare true biweekly mortgage payments with adding a fixed amount to each monthly payment. The timing and annual extra principal are not always the same.
Read guide →Mortgage Payments & AmortizationEstimate the payoff and interest effect of adding $200 per month to mortgage principal. Use your own balance, rate and remaining term in the calculator.
Read guide →Mortgage Payments & AmortizationLearn why applying extra money to principal can reduce future interest and shorten a mortgage payoff schedule.
Read guide →Mortgage Payments & AmortizationLearn how mortgage amortization splits each payment between principal and interest, why the split changes, and how extra payments can shorten payoff time.
Read guide →Mortgage Payments & AmortizationUse the fixed-rate mortgage payment formula to calculate monthly principal and interest from the loan amount, interest rate and term, with a worked example.
Read guide →Mortgage Payments & AmortizationCompare practical ways to shorten a mortgage payoff schedule, including extra principal and biweekly-style strategies.
Read guide →Mortgage Payments & AmortizationCompare a one-time mortgage principal payment with smaller recurring extra payments.
Read guide →Mortgage Payments & AmortizationEstimate principal-and-interest payment on a $250,000 30-year mortgage at a 6% annual interest rate.
Read guide →Mortgage Payments & AmortizationSee how an extra $100 monthly principal payment can shorten a mortgage and reduce interest, with an example and a link to the payoff calculator.
Read guide →Mortgage Payments & AmortizationSee a worked example for a $300,000 30-year mortgage at 6.5%, including monthly principal and interest and lifetime interest.
Read guide →Mortgage payment formulas, amortization schedules, extra principal and worked loan-payment scenarios. The pages in this cluster are intentionally connected: calculator pages handle the arithmetic, while the guides answer informational searches, show worked examples and explain how to interpret the result.
Use the examples as reference points, then open a calculator and substitute your own values. For decisions involving contracts, taxes, health, payroll rules, construction requirements or other high-stakes details, verify the real-world assumptions with an appropriate authoritative source.
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