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About
Quant Calculators is a library of 448 free financial calculators across 10 categories. It exists because the gap between a money question and a trustworthy answer is usually not knowledge, it is arithmetic nobody wants to set up twice.
Why it exists
Should I take the fifteen year or the thirty year? What does an extra hundred a month do over twenty years? Is refinancing worth the closing costs? These are arithmetic questions with exact answers, and the only thing standing between you and the answer is the setup: remembering the formula, laying out the cells, and trusting that nothing is off by a row.
Doing that once is fine. Doing it for every decision, and doing it under time pressure with a lender waiting, is where people give up and accept whichever number they were handed. That is the gap this site is built to close.
So each calculator here is narrow on purpose. It asks for what its question needs and nothing else, it answers as you type, and it shows the working. That is a lower bar than financial advice and a much more useful one, because you can verify it yourself.
How it works
Search the spotlight for the decision in front of you, or open the category it belongs to. There is one calculator per question rather than one estimator with a mode switch, so the tool you land on asks only for the inputs your situation actually has.
Every calculation runs in your browser. Nothing you type is posted to a server, attached to an account, or stored, which is what makes it safe to put a real salary or a real debt balance into the form instead of a rounded guess.
Results recompute on every keystroke, and the arithmetic behind them is stated openly. A loan payment arrives split into principal and interest; a savings projection arrives split into what you contributed and what compounding added.
Because the formula is standard rather than proprietary, you can verify any result against a textbook, a lender, or the agency that publishes the underlying figures. That is the whole point: a number you cannot check is not much better than a guess.
The catalog
What we hold to
Amortization, compounding, and present value math as taught and as used by lenders. Every tool page names the specific federal body its category is checked against and links directly to that body's own published data, not a summary of it.
Advertising funds the site. There is no paid plan, so there is no feature held back to create one, and no calculator that stops halfway to ask for an email address.
A result here is a planning number, not an offer. Fees, underwriting, and rounding sit outside what we can see, so we say where a figure is likely to move rather than implying a precision we do not have.
You will not find visitor counts, testimonials, or trust badges on this site. The verifiable facts are the size of the catalog and the math inside it, so those are the only things we point at.
Who checks the numbers
No one on this team is a licensed financial advisor, and a byline claiming otherwise would be worse than none at all. Instead, every one of the ten categories below is tied to the specific federal or quasi-federal body that actually publishes the rates, limits, or rules its calculators are built on. Every tool page links to that body's own page in its Last Updated line, and the same citation is embedded in the page's structured data.
How it is paid for
The site carries advertising. That is the entire business model, and it is worth saying plainly because it explains the things you would otherwise have to guess at: why there is no account, why nothing asks for your email, and why no calculator stops at the interesting part and offers to show you the rest for a fee.
It also sets a limit we hold to. We do not sell the figures you enter, because they never reach us. We do not broker leads to lenders or brokerages, so no result is tilted toward a product that pays us. If a calculator tells you refinancing is not worth it, that is simply what the arithmetic said.
Nothing on this site is financial advice. It is arithmetic applied to numbers you supply, offered for educational and informational purposes, and it works best as preparation for a conversation with someone who knows your full situation. The terms of service and privacy policy spell out the rest.
The catalog is open. No sign-up, no meter.