Many homebuyers are trying to understand how to estimate monthly housing costs before speaking with a lender, and one of the most reliable starting points is using a mortgage payment calculator to break down principal, interest, taxes, and insurance based on current market rates. Comparing different loan types—such as a conventional loan, FHA loan, and VA loan—can help buyers understand how eligibility guidelines and down-payment requirements affect affordability. For those planning to restructure their existing mortgage, running numbers through a refinance calculator can make it easier to assess potential savings before starting the application process.