Free personal-finance calculators
Fast, free, no-signup calculators that show you the real numbers — monthly payments, total interest, and a clear breakdown — with plain-English explanations of how each one works.
Mortgage Calculator
Estimate your monthly mortgage payment including principal, interest, and a full amortization schedule.
Auto Loan Calculator
Work out the monthly payment and total interest on a new or used car loan, with trade-in and down payment.
Why SteadyCalc?
Most financial decisions come down to a few numbers: what will this cost me each month, how much interest will I pay over time, and what changes if I put more money down or pay it off faster? SteadyCalc answers those questions instantly, without asking you to create an account or hand over your email. Every calculator runs entirely in your browser, so the figures you type never leave your device.
Each tool comes with a clear explanation of the math behind it, a worked example, and answers to the questions people ask most. The goal is simple: help you understand the number, not just see it.