About RateCrafted

RateCrafted is a collection of free personal finance calculators for US households. Every calculator runs entirely in your browser — nothing you type is sent anywhere or stored.

Our approach

We show the formula behind every result and walk through a worked example, so you can check the math yourself. Calculations use standard amortization and time-value-of-money formulas.

Not financial advice

Results are estimates for education and planning. Your lender, broker or a qualified professional can give advice for your situation.