← All calculators
FAST Calc — Side-by-Side Mortgage Comparison
Compare any two lending scenarios in seconds.
About this calculator
FAST Calc is built for the speed of a live client conversation. Enter two or more loan scenarios and instantly see payment differences, total interest, and long-term wealth impact laid out in a single view. No spreadsheet required.
What it shows you
- Monthly payment for each scenario
- Total interest paid over the loan term
- Break-even and crossover points
- Net equity and net worth projections
- Shareable client report output
Why it matters
"Which option is better?" is the most common question in a mortgage conversation. FAST Calc answers it visually, clearly, and instantly — so the meeting stays productive and the client leaves confident.
Related calculators
Home Refinance CalculatorBreak-even horizon, monthly savings, and total interest reduction — before you commit.Open calculator →Blended Interest Rate CalculatorCombine multiple balances into the one rate that actually matters.Open calculator →FHA Streamline Refinance CalculatorNew payment, mortgage insurance, and break-even — without the guesswork.Open calculator →HELOC Calculator — Home Equity Line of CreditDraw-period payment, repayment payment, and the jump between them — in one view.Open calculator →