The idea
Most online financial calculators answer one narrow question — "what's my monthly payment?" — and stop there. In practice, the decisions people actually face are more specific: should I refinance now or wait? Is paying off this card or that one first faster? When does PMI actually drop off my mortgage? FinCalcKit is built around those specific, real-life questions.
How the calculators work
Every calculator on this site runs entirely in your browser using JavaScript. Nothing you type is sent to a server, stored in a database, or shared with anyone. You can close the tab and everything you entered disappears — that's by design.
What's available today
FinCalcKit currently covers mortgages and home loans (extra payments, PMI removal, biweekly schedules, refinance break-even), auto loans (trade-ins, rebates, sales tax), debt payoff (snowball vs. avalanche, debt-to-income ratio, student loan refinancing), and retirement and tax planning (Roth IRA conversions). More calculators are added over time, focused on the same kind of specific, decision-driven questions.
Accuracy and limitations
We try to keep the underlying formulas and reference figures (like tax brackets) accurate and up to date. That said, every calculator produces an estimate based on the numbers and assumptions you provide — it isn't personalized financial, tax, or legal advice. See our Terms of Use for details.
Questions or feedback
If you spot something that looks wrong, or have an idea for a calculator that would help you, visit the Contact page.