About LoanMath

LoanMath is a set of free calculators for car, personal, student and mortgage math — monthly payments, amortization schedules, payoff and refinance comparisons. Every tool runs entirely in your browser; the numbers you type never leave your device.

The formulas (standard amortizing loan math, PMT, remaining-balance and effective-APR methods) are published financial mathematics that do not change, so the site stays correct without updates.

LoanMath is maintained by an independent maker. It may show non-intrusive advertising once traffic justifies it. We do not collect or sell your data.