Money math for real-life decisions

Free calculators that compare your options side by side, so you can see which choice saves more and which one lowers your monthly bill. No sign-up, and nothing you type leaves your browser.

Mortgage

Mortgage Recast Calculator

Putting a lump sum toward your loan? Compare recasting, prepaying and refinancing: new payment, interest saved and payoff date.

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How our calculators work

Every calculator uses standard amortization math and shows the formula it relies on. Instead of a single number, we show the trade-offs: a lower monthly payment and a lower total cost are often different choices, and the right one depends on your situation.

All calculations run in your browser. We don't ask for your name, email or account details, and we don't store what you enter.